Moominpappa is inspired to put on a play all about his own adventurous youth. But the pressure to fill his father's shoes makes Moomintroll's tail hairs fall out, and his mother's medicine has some rather surprising side effects!

Incensed by the rule-loving Park Keeper, Snufkin plots a cunning revenge. But when his friends get the blame for his actions, Snufkin must come to their rescue.