Dr. Lena Petrova has found the impossible: a lost city frozen beneath the arctic ice. To reach it, she needs the best pilot alive. That pilot is Eva Rostova, a reckless, infuriatingly cocky airship captain who scoffs at plans and lives for the thrill. With a ruthless rival hot on their trail, these two clashing women must rely on each other to survive the unforgiving landscape and protect a discovery that could change history.