The summer holidays begins but this year ten-year-old Lea stays at home. The girl rides her bike through the village all by herself and goes to visits Mark, an old musician. One afternoon she spots five boys lifting an oil barrel over the fence of a paint factory and driving away with their loot on a bicycle trailer. Lea discovers that they built a raft. Girls are not allowed in their gang but Lea wants to be part of it very badly and takes them up on a dare. Soon a boring summer is full of adventure.
