The three friends play around a small puddle by the lake with their toys. Oto has a can of salt that his parents gave him to build "a hangar". To avoiding having to go over to the litter bin, which is too far away, he empties the salt into the puddle. Suddenly, Oto realizes that several goldfish and tadpoles are looking ill and trying to escape from the water. The four friends decide to act. Each has a mission: Vik runs to warn Ranger Loops while the others try to save the animals. But they can't see the little bugs that live inside the puddle, so Yoko decides to use his magic: Mai, Oto and Yoko become tiny beings and help rescue the animals with a toy-submarine, a toy-seaplane and a toy-boat. But that's not enough, so they all need to work together to find a better solution. Oto learns that he should not dump any substance in the park.
