A new inventor is in town who has created a mechanical knight named Max. She also invents a submarine in honor of her deceased son who loved the ocean. At night, Diego catches people sabotaging the submarine. Lolita and the kids get invited to join her on the first dive underwater. Because of the sabotage, the submarine begins to sink and the kids are forced to evacuate. Zorro fights off sharks, saves Lolita, and exposes who sabotaged the ship.