The adventure of a lifetime begins with one small pebble.

A bashful bachelor penguin named Hubie, who's partial to a pretty female named Marina. Ancient penguin ritual dictates that males present a pebble to their intended, then mate for life. Hubie finds a spiffy stone, but before he can bestow it on Marina, dastardly rival Drake tosses him into the churning sea, and Hubie gets swept away.