Set in the final days of autumn and the approach of winter, various characters begin to experience a change within themselves and decide to travel to Moominvalley where they can visit the Moomins. First amongst them is Toft, a small orphan who lives alone in a docked boat under the tarpaulin, and who has often dreamed about the Moomins despite the fact that he has never met them. Secondly is Fillyjonk, a woman who is usually obsessed with everything being neat and tidy, but who has an epiphany after suffering an accident and decides to "see people. People who talked and were pleasant and went in and out and filled the whole day so that there was no time for terrible thoughts". The Hemulen similarly begins to question his lifestyle, realising that his life as a collector and organiser of things simply isn't necessary, whilst a senile old man who cannot remember his own name but who calls himself Grandpa-Grumble decides to go to the "Happy Valley" that he remembers from the past. Alongside these figures, Mymble also decides to visit the Moomins in order to see her daughter Little My whom they have adopted, and Snufkin also returns, realising that the valley is the place where he can gain inspiration to write a song.