Bamse has run out of thunder honey. Little Hop and Shellman set out to find more thunder bells, the secret ingredient that turns ordinary honey into Grandma’s famous thunder honey. Meanwhile, Reinard Fox has devised a cunning plan to take Bamse’s place as the town hero. How will Bamse manage without his thunder powers? And what dangers await our friends once they’ve crossed the sea and landed on Crag Island? In his hunt for thunder bells, Bamse has to learn something important: you can get much further than you’d think just by being yourself – something that Reinard Fox would also do well to understand…