Casey anxiously awaits the arrival of his second master, but RJ begins to feel forgotten as a result. It gets worse for him when the master of the Shark technique arrives, and turns out to be his estranged father, Master Finn! Can Casey harness the Spirit of the Shark and smooth things out between RJ and Finn? Meanwhile, Jellica continues her training of Dai Shi, and unleashes Crustaceo on the city!