Mr. Mallet, the Guardian of the Aquarian world, spends his days patrolling the waters, protecting the inhabitants from any danger. He has become a legend among the Aquarians, and they look up to him as their savior. However, Mr. Mallet is not satisfied with just protecting the world; he wants to explore and discover new things.

One day, while on patrol, Mr. Mallet notices a group of unfamiliar creatures swimming towards the Aquarian world. He immediately alerts the inhabitants and prepares to defend their world. As the creatures approach, Mr. Mallet realizes that they are not hostile but lost travelers who are looking for a new home.