Only the last pearl left to acquire the Pearls of Light and Darkness and awaken the Shellies. But, how can it be?! The last pearl is in the Sapphire Sea and despite knowing it very well, they haven't seen it all this time. Where can it be? Tentaclus, Fairies and Mermaids race to be the first to find it, but this time, Pets will be the ones playing the most important role. What will happen? Will Fairies and Mermaids get to the pearl before Tentaclus does?