Because of trap, Winter the dolphin lost its tail. Winter survived because helped people who find it. But, without tail Winter can not swim again.
Sawyer (Nathan Gamble) find Winter is wounded. And then, Winter taken to Clearwater Marine Hospital. Winter was rescued but its tail not. Now, Sawyer and his friends try to help Winter to swim again.
Dr. McCarthy (Morgan Freeman) is a prosthetic expert who tried to make an artificial tail to Winter to be able swim again. But this is not easy because makes an artificial tail has never been done before. Can Sawyer and Dr. McCarthy help Winter?