With Sara still away from the Waverider, the Legends find a new Encore with Ava’s new invention, the Prognosticator, and must now try to defeat Genghis Khan in 1990s Hong Kong. Constantine’s life is hanging in the balance, and Ray, Nora and Gary all try to help him, but Constantine tries to make a deal with Astra instead. Meanwhile, Behrad has been confused about Charlie’s recent behavior, but they all learn why Charlie is trying to out run her past and from what

Everyone is eager to use the Loom of Fate, but the team must decide who they want to bring back first leaving Charlie to make a tough choice. Sara struggles to understand what has happened to her and with the help of Constantine and Ava, they try to figure out how to help her. Meanwhile, Rory has a guest on the ship that he is trying to impress.

After a night of celebrating their beating the Fates, the Legends quickly discover that Sara is missing. Ava sends Rory and Behrad to follow a lead on who can possibly help them find Sara, while Constantine tries to work his magic. Meanwhile, Sara does all she can to try to escape but is shocked to learn who one of her kidnappers turns out to be.

With Ava a wreck, the Legends make a last-ditch effort to keep Sara from being abducted in the first place, even knowing that it will alter the timeline. Sara grapples with a discovery about herself and is shocked when Rory finds her on the mystery planet. Meanwhile, Spooner envisions what her life would be like if she hadn't joined the Legends.

After Sara, Ava, Behrad and Gary arrive in New York City, they track down Dr. Gwyn Davies, who isn't the scientist they expected. Astra, Spooner, and Gideon are still trying to stop the Legends from using the time machine, but they run into some more setbacks along the way. Meanwhile, in the pocket dimension Nate and Zari work together on the Hoover situation as well how to make their future together work.

With some help from an unexpected person, the Legends break a fixed point, creating an aberration that will attract the Evil Waverider. The Legends are soon shocked at who has been hunting them and Sara tries to negotiate which doesn't go as planned. Seemingly out of options, Gwyn rises to the occasion by using his military experience and hatches a stealth plan. Meanwhile, Gary helps Astra realize what she is side lining Gideon from the mission.