It tells the remarkable true story of athlete Diana Nyad who, at the age of 60 and with the help of her best friend and coach, commits to achieving her life-long dream: a 110-mile open ocean swim from Cuba to Florida. At the age of 60, and 30 years after giving up long-distance swimming for a prominent career as a sports journalist, Diana Nyad (Annette Bening) becomes obsessed with accomplishing the feat that has always eluded her: the nearly 180-kilometer swim from Cuba to Florida, known as “the Everest of swimming.” Determined to be the first person to make the swim without the protection of a shark cage, Diana embarks on a thrilling four-year adventure with her close friend and coach Bonnie Stoll (Jodie Foster) and a dedicated team.