"Leave" Moominvalley? Is it possible? Yes, even the Moomin family need a change of scenery sometimes, so they're off to live in a lighthouse on a tiny island. Here they find space to grow, and to do things they couldn't in their comfortable, cluttered valley home. As they discover their new home, the family also discover surprising, and wonderfully funny, new things about themselves.

Now that autumn is turning into winter, a group of unlikely friends--including the Fillyjonk, the Hemulen, and Toft--are waiting in Moominvalley to see the Moomins, for winter doesn't seem right without them. But the Moomins are not at home. So all the visitors settle down to await their return, and oddly enough find themselves warming up to their new life together. For Moominvalley is Moominvalley still, even without the Moomins in it.