In the summer of 1974, after losing his mom to cancer, Billy McMillon, an inquisitive eight-year-old boy with an innate need to be near nature, goes on a sailing expedition with his eccentric grandfather, a famous scientist who is on a mission to uncover the truth behind a mysterious illness plaguing pods of bottlenose dolphins. Suddenly, tragedy strikes, and young Billy's life is turned upside down for a second time. He's back in New York, living...