The Californian sea otter is one of the rarest, and possibly cutest animals in the world. So when a sea otter mum decides to have her pup amongst the yachts of a millionaires' marina, it is a unique event. The mum must teach her baby how to dodge the boats and find the food in this busy harbour. However, the arrival of a tough male sea otter signals disaster for the family. When mum is attacked, the poor pup is left on her own and must fight for survival.