When a mysterious woman finds her way into the vault, the team struggles to understand who she is and with whom her allegiances lie. Meanwhile, Alex must come to terms with her complicated feelings when she finds herself in a tight spot.
Diana and Ichabod attend a elementary school performance of Valley Forge featuring Molly. Ichabod cheers loudly at Washington's speech, drawing stares from the parents. He then complains about the stiff choreography and goes back to applauding loudly. Afterward, Molly asks if they liked the play. Ichabod assures her that she's a natural actor, and Diana cuts him off when he starts complaining about her dancing. Molly's friend Kendra comes over and Molly asks if she can go to a sleepover with Kendra, and Diana agrees. Once she leaves, Diana admits that it's hard to cut loose with a madman on the loose, and Ichabod gets a call about Malcolm. Diana briefly notices a woman in the back of the hall, but she disappears and Diana says that she felt like someone walked over her grave
Jobe checks with Malcolm as he puts on fresh clothing, and the demon assures him that their avatars of Pestilence and Famine are resting comfortably. As for the Avatar of Death, he's working on it. As for the last Horseman, Jobe is attending to his acquisition personally. Malcolm suggests that they get a steak dinner. They're unaware that Alex has hacked into their laptop via Malcolm's secretary's cell phone, and the team is at the Vault watching via the laptop webcam. Eventually she'll figure out where Malcolm is. Jenny points out that in my mythologies apocalypse is a precursor of rebirth.
Jake spots a painting of Malcolm's flag with a symbol and goes to the books. He's unaware that the woman, Lara, is watching from the balcony. She ducks out of sight as the others come in and Jake explains that the symbol is Masonic. Ichabod recognizes the symbol as well and explains that the Masonic offshoot, the Ama Mutatis, was going to change the world for the better. Meanwhile, Lara secretly comes downstairs, takes a book, and ducks back. The Ama Mutatis believed that the Horseman were the symbol of change and sought to bind them to human hosts using powerful supernatural items. They figure Malcolm will have to find the totem of War, next, and there's a reference to a Weapon of Fire. The Ama Mutatis believed that it was hidden in America during the Revolutionary War.
A proximity alarm goes off and Alex spots Lara running through the tunnels. Lara shuts off the camera, and Diana and Ichabod go into the tunnels to search for her. She hides and lets Diana go by, but Jenny is waiting for her. Lara tells her to come back and get the book, and the two women fight. Lara finally gets Jenny in a chokehold, and sees a tattoo on Lara's right wrist. She breaks free but Lara takes her down and runs off.
Back at the Vault, Jenny tells Ichabod what happened and that Lara seemed to know what moves she was going to make before she made them. The tattoo was the same one that the other men had. Jake confirms that a book from 1780 is missing, and contained bills of lading and shipping logs. It also contained a log of courier mission to Maryland that George ordered. Ichabod remembers that he was on the mission and traveled with Benjamin, before he became one of George's men.
Ichabod and Benjamin travel behind enemy lines and hide in a barn. Benjamin assures him that the parts are secure, and tells Ichabod that it can be used to spark a conflict beyond all others. He doesn't trust the Founders with the device, and disagrees with Ichabod that all voices will be heard. Ichabod insists that the future will be bright, just as someone tosses in a torch. The two men get outside as the British set the barn on fire, and Benjamin figures that it's best that the box they were couriering was destroyed. He assures Ichabod that the items lost still live in his memory, and the two men leave.
Ichabod figures that the item was the totem of War. Jenny stays with Alex and Jake to help them beat Malcolm's IP encryption and find out where he is, while Diana and Ichabod go to the site of the barn. When they arrive at the barn, Ichabod is surprised to see that the barn is intact. They go inside and discover that the structure is now a warehouse. The hostess, Bryce, explains that she and her partner rebuilt it exactly as it was, in 2012, and refuses to let them look around. Their next available reservation is six weeks out.
Jenny calls Donnie and tells him that she'll put together a team to recover the artifact. She warns him that she has some stuff in DC to finish up, and Donnie says that it's a few weeks out. Once Jenny hangs up, Alex says that she's narrowed down Malcolm's location and they head out to pinpoint the location.
Ichabod and Diana sneak into the barn and find Lara waiting for her holding the box. Lara tells them to get out, and Jobe comes in and magically knocks Ichabod and Diana back. He then tells Lara that she's wasting her time trying to run from him. Lara takes out an Atlantean chronos crystal and the backlash knocks her out but teleports Jobe away. Ichabod opens the box and finds a metal-plated flintlock pistol: the totem of War.
Diana takes Lara to a safe house and Ichabod suggests that Lara is part of the Ama Mutatis. The Homeland agent vaguely remembers seeing Lara's face before. Ichabod tells her that the pistol was forged from legendary blades on the anvil used by Ares. He turns on the intercom and asks Lara if she knows what the weapon is. Lara says that if they don't let her go then something terrible will happen.
Jenny, Jake, and Alex find a house and discover that he has security patrols all over the area. When Jenny asks what their plan is to get in, warning that she won't be there forever, Jake points out that they wouldn't be there except for her. She persists and Alex figures that they need to do recon. Jenny agrees and they split up with Jenny going one way and Jake and Alex the other.
Diana asks Lara why she want the pistol, and Lara warns that "they" will be there any moment to get the gun. Lara knows all about Jobe and Malcolm, and warns that Malcolm won't rest until he gets the gun. She explains that when the gun is fired, it raises the Horseman of War, and she's trying to help them. Diana introduces herself and Ichabod, and Lara gives her name. Ichabod comes in and points out that Lara has magic, and she warns that the crystal only nudges Jobe outside of time for a bit. Ichabod warns that the magic is risky, and Lara admits that she used it as a last resort. When he returns, Jobe will find the gun, Malcolm will find it, and the gun will fall to pieces. Lara insists that they have to destroy the gun, and warns that the clock is ticking.
As they recon, Jake point out that Jenny saying she won't be around forever was weird. Alex notes that Jake's life has gone all Missy-centric and Jake tells her that he'd like his best friend and his girlfriend to get alone. As Alex starts to complain that Missy is Jake's girlfriend, they find four sealed coffins. The Headman's axe is there but not the Horseman. Jobe speaks from the shadows, saying that the Horseman is running late, and tells them that Malcolm has some questions about the gun's location.
The next day, Malcolm questions Alex and Jake. Jake claims that the rest of their team will be there shortly, but Malcolm is unimpressed. He knows who they are and tells them that the others are out of their league. Alex realizes that Malcolm knew they tapped his feed, and he admits that he doesn't know where Ichabod has taken the gun.
Diana frees Lara as a gesture of trust, and Lara explains that they have to take the gun to a nexus of primal energy to destroy it. They go to an abandoned factory where Lara says that the ley lines cross.
Jake tells Malcolm that they don't know where Ichabod is, and Jobe burns him with his touch. He then breaks Alex's neck, and then snaps his finger and reveals he projected an illusion into Jake's mind. Malcolm asks Jake if he wants to experience it for real, and Jake begs him to stop. Jobe realizes that Alex is the one they need to concentrate because her feelings are closer to the surface. Jake agrees to tell Malcolm what he knows if Malcolm has Jobe back off, and Malcolm agrees. The researcher says that Ichabod got his information from a reference book on the history of the gun and the society.
Ichabod, Diana, and Lara go to the nexus and as they move the objects in the way, Lara says that she's seen Malcolm's work first-hand. Malcolm raised her as an orphan and she knows what he wants to achieve, and then grabs the gun and locks Ichabod and Diana in. She tells them that she can't let Malcolm win and runs off, and Ichabod realizes that Lara lives there. The stolen book is stored there along with a belt containing enchanted crystals. Diana suggests that she climb out the window, work her away along the ledge, and let Ichabod out. She says that she secretly put a tracer on Lara and smashes the window open.
At Malcolm's house after Malcolm and Jobe leave, Jake tells Alex that he couldn't bear to see Alex die. He explains that Jobe burned him to his soul and projected the illusion that he killed Alex. Alex tells Jake that he was really brave, and starts to tell him her true feelings. However, Jenny drops down and takes out the guard watching them.
Once they escape, Diana follows the tracer on Lara and come to a nexus in the woods. The Flame of the Eternals is burning there, and Ichabod explains that it's an offshoot of Hephaestus' forge. Lara arrives at the Flame and calls on the Flame to destroy the gun. When the Flame burns brighter, Lara throws the gun in. Jobe telekinetically grabs it and gives it to Malcolm, and Lara tells Malcolm not to do it. He's surprised to see her, and says that she's a bit ahead of schedule.
Diana and Ichabod arrive and Diana tells Malcolm to drop the gun. Ichabod threatens Jobe with one of Lara's crystals, and Lara tells them both to leave. Malcolm tries to fire the gun, and Diana shoots him. When Lara leaps forward, Jobe smashes her aside. Malcolm laughs as his bullet wounds heal, and Lara grabs the crystal from Ichabod and tells them to run. She then throws the crystal at the ground and it explodes.
Jenny, Jake, and Alex run to the coffins and see the President's helicopters flying overhead. They realize that Malcolm is going to use the totem of War to take out the President.
Lara flees with Ichabod and Diana, and warns that the crystal won't hold Jobe and Malcolm for long. Jobe and Malcolm catch up to them, and Malcolm says that if he doesn't kill Ichabod and Diana, then Lara will never be. He tells her that he's seen the future he wants and Lara is part of it. Ichabod realizes that Lara knows other time magic, and Malcolm explains that Lara is from the future that he is about to create. Lara says that a different Crane helped her come back so that she could destroy the gun so that Malcolm wouldn't turn Diana into the Horseman of War. Diana realizes that Lara is her daughter Molly, and Lara tells her that after the Washington play, she went to the sleepover and in the morning they told her that Diana was gone.
Malcolm interrupts and asks if the Cubs ever make it to the World Series. Lara tells him to choose someone else as War, but Malcolm says that Diana is a perfect fit for the job. The girl points out that Malcolm was kind and generous when he first took her in, and taught her to fight for what she believed. Lara says that he can be so much more than a tyrant, but Malcolm ignores her and shoots Diana. Ichabod leaps in the way and takes the bullet. Diana goes to him as his chest glows red, and Ichabod says that he can feel the bloodlust and the armies... and declares that he has become war. With that, Ichabod disappears in a burst of flame.
- It's revealed that Ichabod is a huge fan of plays and musicals, even those made by kids.
- It's official here that Ichabod is the new Horseman of War; only temporarily, before Henry reprised his role.
- We've been introduced to Lara and later discover she's Molly from the future. Part of her life has been exposed here.