After repairing the Moominhouse, the children take the magic hat down the river and drop it into water. The next night they discover that the hat has floated to land on a sandbank, turning water into raspberry juice and fish into canaries.
On one particularly hot summer day, Moomintroll and other children spend the night in a cool grotto on the beach. While Moominmamma cleans the house, Hemule's seed and flower collection ends up in the magic hat. Welcome to the jungle.
The nervous duo of Thingumy and Bob arrive from the mountains, carrying a mysterious suitcase. When they inform that the frightening creature Groke is coming, the whole Moomin family goes into panic mode. The night will be chilly.
The trial is about to begin under a watchful eye of the Honorable Judge Sniff: the frightful Groke vs. tiny foreigners Thingumy and Bob. Who owns the suitcase and its mysterious contents? Maybe the answer lies in the magic hat.
Fall is around the corner and Moomintroll has tears in his eyes. His best friend Snufkin is leaving from valley for the winter. Thingumy and Bob's hideout in the bushes reveals a mesmerizing secret and Moominmamma's handbag goes missing.
The big search is on. The whole Moominvalley is after Moominmamma's precious handbag. With the help from the sneaky Thingumy and Bob, there will be a happy autumnal garden party after all.
The autumnal party continues in Moominvalley and there are two surprises: first Thingumy and Bob reveal the contents of their suitcase, and then the Hobgoblin and his flying panther joins the party all the way from the Moon.
The great autumn party goes on and on. The night is full of miracles, since the Hobgoblin is fulfilling a wish for everyone. Moomintroll has a special gift for his friend Snufkin and Snork Maiden gets a makeover.
The night is nearing its end, but the party isn't over yet. There are still plenty of fireworks and dancing ahead, and the Hobgoblin has a last surprise in store: he's giving out presents for everyone.
Land ahoy. After a sea journey, the Moomin family discovers a barren, desolate island. During the exploration of the island, Hemulen stumbles into a large barometer. Here come the Hattifatteners.