Athlete Diana Nyad sets out at 60 to achieve a nearly impossible lifelong dream: to swim from Cuba to Florida across more than 100 miles of open ocean.

Cruz Manuelos, a rough-around-the-edges but passionate young Marine, is recruited to join the CIA’s Lioness Engagement Team to help bring down a terrorist organization from within. Joe, the station chief of the Lioness program, is tasked with training, managing and leading her female undercover operatives.