An inquisitive fox named Marco and a bored flock of pigeons join the crew of deer Captain Sylvia, setting sail in her antlered ship in search of a wonderful island and finding friendship on the way.
One day a small sea serpent falls from the faucet into the tub as a child is about to take a bath, and as the days go by and the serpent grows, they both realize that he needs to go back to the sea where he belongs.