Stinky Diver arrives at the Action Headquarters to discover that all of his property has been messed with, the perpetrator behind these actions turning out to be someone known as the Red Ninja (much thanks to a ninja star that finds its way into Meltman’s back). The Red Ninja, a rival of Stinky’s from years ago, has come back for revenge, and the only way Stinky can defeat him once more is by visiting his old sensei, Master Pu, to gather forgotten tips.