Stink accidentally discovers the long-lost Golden Crown of Greatness and is magically elevated to regal status with control over everyone in Treetopolis. Everyone, that is, except Tom. Installing himself in the castle, he orders his subjects around until he realises he is obliged to be responsible for them. Judging sparkle spells, naming baby aphids, launching a boat - everyone wants something from the King, and it becomes all too much for Stink. In the end he decides he wants his old life back, chooses to give up the throne and with Tom's help puts the crown out of harm's way.