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.

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.