Dark clouds are looming in Mathildewick Cove. The arrival of a new football coach is putting twelve-year-old Lena’s goalkeeping career in doubt. And in the house next door, Trille is wondering how to impress the girl who has just joined his class. The stage is set for a dramatic year ahead. What are Trille and Lena to do when every raft they build sinks, and every message in a bottle they send washes up on the shore at home?