Imagine yourself as a diver, immersed in an extraordinary aquarium in city scale!

A very little pearl escapes from its case and leaves to discover the underwater world. There she will meet playmates, multicolored fishes, sea horses, joker quids, bewitched jellyfishes. But she will also meet the terrific sea snake who thinks only of one thing: to swallow her!

Other inhabitants of this fantastic world will then interfere themselves... What will happen to our adventures?

Will she be able to return to her protective shell without leaving too much mother-of-pearl there?