The Legends find themselves in 2045 trying to defeat an Alien warrior which leaves Zari no choice but to enter a popular singing competition. Sara finds herself struggling after being attacked but someone familiar helps her to keep searching for refuge. Meanwhile, Zari and Constantine have a much-needed conversation with each other.

With Astra now a mortal, she finds it hard to adapt to the real world with no guidance from Constantine. Frustrated and lonely, Astra makes a new friend who promises to help her, but her eagerness for the easy way out could have some real repercussions for those closest to her. Meanwhile, Sara meets the person responsible for her kidnapping and tries to convince others to help her escape.

Mick takes the Waverider and Kayla to try and find Sara, but these enemies find themselves needing each other to survive after landing on the possible planet Sara is being held captive. After a report of an Alien attack, the Legends return to their new headquarters where both Spooner and Astra try to connect to the Alien. Meanwhile, Sara devises a plan to escape by using her charm to win over Bishop.

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.

With the Legends on high alert with their unwanted guest in their custody, Ava is tasked with the interrogation while Nate and Sara watch. Rory is struggling with the terrible pain in his head and Gary tries to help to manage it the best he can. Meanwhile, Zari enlists Astra and Spooner's help to figure what is going on with Constantine.

When Astra and Spooner find themselves as stowaways, they learn that Constantine is still chasing the Fountain of Imperium and find themselves in 1920s Texas. With the rest of the Legends stranded, they come up with a plan to get help by using Rory as bait that will also help reunite him with something that is special to him. Meanwhile, Spooner learns some information about her past that she wasn't expecting.

With Astra, Spooner and a now-human Gideon trying to save the Legends, Gideon becomes overwhelmed by her new human choices sending her into a catatonic state. Astra and Spooner combine their powers to enter Gideon's mindscape and discover that a virus is trying to erase all of Gideon's memories. Acting fast, they devise a plan to defeat the virus before it's too late. Meanwhile, the Legends are about to go up against a powerful new foe.

When the Legends crash land in 1940s Seattle, they find themselves right in the middle of WWII with a surprise guest. Needing replacement parts to fix the time machine, Sara, Ava, Astra, Spooner and Gideon find themselves working in different sections of an airplane factory alongside "Rosies." With Astra frustrated with inequality in the workforce, she takes matters into her own hands. Meanwhile, Behrad offers to play host and help teach Nate about Persian culture and etiquette.