The 12-year-old German boy, Mathias, discovers his sexuality on a sailing boat in Denmark. Surrounded by water, trapped on the boat with his parents, who still treat him like a child, his desire is to get on land to have new experiences.

The family of a wealthy businessman gather to celebrate his 60th birthday. During the course of the party, his eldest son presents a speech that reveals a devastating secret that turns the night into a battle of truth and denial.