A classic Moomin story reworked in full color, with a kid-proof but kid-friendly size, price, and format. It’s getting hotter and hotter in Moominvalley, and all the creatures have taken note of the troubling weather. After a mysterious cloud appears in the sky one day, an exodus begins. The Hattifatteners, the Nibling, Mrs. Fillyjonk , and even Mymble pack up to leave the valley. When they realize the mysterious cloud is a comet headed straight for Moominhouse, Moomin, Little My, and Snorkmaiden decide to depart their home too. Between a tidal wave and a comet-struck Moomin, the end does seem nigh, but the day may yet be saved!