Mr. Mallet, the Guardian of the Aquarian world, has been busy protecting the underwater world from any harm. He has developed new technologies to detect and neutralize any potential threats to the world. He has also been working closely with the Aquarian people to ensure that their world is thriving.

One day, while patrolling the waters, Mr. Mallet comes across a group of humans who are dumping toxic waste into the ocean. He immediately jumps into action and uses his device to neutralize the waste. The humans are surprised to see him and try to attack him, but Mr. Mallet is too quick for them. He captures them and brings them to the Aquarian world for trial.