17-year-old Julian Feldhof lives with his mother Clara in an idyllic village on the Baltic Sea coast. At the age of twelve, he witnessed the murder of his father. But he can't remember anything. The killer was never found. When the architect Phillip Koch suddenly appears in the village and pretends to be looking for a suitable plot of land for a holiday settlement, Julian becomes suspicious. Clara falls in love with the stranger, but Julian is certain that the man is his father's murderer.