In his desire for more independence, Moomintroll pushes Moominmamma away. But he soon becomes jealous when she finds a new outlet for her motherly love.

Sniff learns that friends are far more important than possessions when he tries to make himself rich by defending the Groke in Moominpappa's impromptu court case, and the Hobgoblin finally arrives in Moominvalley.

Moomintroll wants to try to stand on his own two feet and moves into his own place with Snorkmaiden. But is Moomintroll ready to give up the care and comfort of Moominamma and Moominpappa?