Thirteen-year-old Niilo's unruly behaviour means his loving parents sent him to Wild School, a young offender's unit on an island in the Finnish archipelago. Angry at first, eventually he comes to enjoy being there and builds a close relationship with his mentor, Hannu, who helps him face his demons and overcome his lifelong fear of water. But when Niilo hears Hannu is leaving, he is so upset he decides to run away. Escaping is one thing, but living alone in the wild is completely different and it tests Niilo to the utmost, especially as his fear of water still haunts him...With the help of a seal, Hannu eventually finds Niilo, but on the way back to Wild School Niilo is thrown into the water and experiences a revelation that will change his life for the better.