Silke loves water. She loves to bathe, and she swims like a fish. Actually she is only really well when she is in the water, because she has some kind of eczema. Her father and mother are worried and go to the doctor with Silke, and he thinks that she is allergic. But mysterious things happen, and a dolphin, a dog and an old great-grandfather, who is a long ago deceased pirate, become important for her. Silke is not like all other children – and especially not when she hears the song of the sea.