Halvar takes the children of Flake with their teacher, Mrs Flart, on an island for a field trip. On the island, two teams are made for the children to compete and bring back a flag from the top of the island and a bucket full of berries. Gibly is with Mrs Flart's team and Vic and Ylvi are with Halvar's team. But soon, the picking of berries turns into a game of Viking-style paint ball, and each child hit by berry juice is eliminated. The last standing are Gilby and Vic. Vic wins after Gilby tries to cheat as much as he can.