When a dolphin named Winter loses her tail in a crab trap, it’s up to a young boy named Sawyer and the staff at Clearwater Marine Aquarium to help her survive against the odds. Sawyer is quiet at first, but his special connection with Winter soon brings him out of his shell. One day, after visiting his cousin at an army hospital, Sawyer gets an idea to have a doctor there make Winter a prosthetic tail.This proposal inspires the staff at the aquarium and fills Sawyer with the hope that Winter may one day swim again.