Little Brother has moved with his family, and a stick son has seen the day of light, but there is no new friends.

When Lillebror's mother is mysteriously hurt in a biking accident, Lillebror and Knerten turn the town upside down trying to find the culprit.

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...