Join the Moomin family in Moominvalley for a wonderful spring surprise. It's winter in Moominvalley and the Moomin family is deep in its Long Winter Sleep, waiting for Too-Ticky to wake them when spring arrives. But when a mysterious ratta-tattle wakes Moomintroll with a start, will he be brave enough to investigate the noise by himself? And what surprises will he find if he does venture outside?