11-year old Julia and Martin are tired of having to flip back and forth between their divorced parents and when they realize how much they look like, they realize to swap places. After meeting at an airport, the each embark on a journey that will change their lives forever.
Tough, naughty, quick-witted and brave Lillebror has just moved, and has not made any new friends yet, when his imaginary friend – the wooden twig Knerten – appears in the middle of a pile of firewood...
When Lillebror's mother is mysteriously hurt in a biking accident, Lillebror and Knerten turn the town upside down trying to find the culprit.
