When Kate’s best friend Em returns from abroad with a surprising new lover, they embark on a reunion vacation with their partners, but the peaceful getaway quickly becomes emotionally complicated.

Set against the backdrop of the greatest clandestine race against time in the history of science with the mission to build the world's first atomic bomb in Los Alamos, New Mexico. Flawed scientists and their families attempt to co-exist in a world where secrets and lies infiltrate every aspect of their lives.