Lucy's situation grows desperate after she's taken captive by Flynn and brought to the 1893 Chicago World's Fair. In their dogged pursuit of Lucy, Wyatt and Rufus fall into a sinister trap.
Wyatt and Rufus go rogue by traveling back to the 1980s in a desperate bid to save Jessica's life. Lucy covers for them in the present as Agent Christopher discovers the ship is missing.
Flynn lands in 1931 Chicago to call in a favor from Al Capone, so the trio enlists the help of Eliot Ness. They also find a clue that reveals something crucial about Rittenhouse.