Join Katsuma, Poppet, Mr. Snoodle, and the other Moshi Monters in an action-packed, song-filled race against time! Together they must stop evil Dr. Strangeglove and his incompetent Glump sidekick Fishlips from pulverising the recently discovered Great Moshling Egg.

Two very different restless youths join a swimming competition for love and friendship which is, in fact, a rite of passage to growing up.