It was a day that really ought to be filled with adventure... Moomintroll and his friends have heard of the legend of the Ocean's Song - held inside a shell, which only its finder can hear. Snufkin takes them to the island of the Hattifatteners but the friends have to turn back to escape a thunderstorm! Will they find the Ocean's Song, and get home in one piece? A brand new picture book adventure based on the beloved Moomin characters by Tove Jansson perfect for all Moomin fans young and old.