An attractive wild young woman, named Mattie, and her plain twin sister, Gwen, arrive at the beach and vie for Mitch's affections. But Mitch is unaware that Mattie and Gwen are the same person, a woman with split personalities which soon lands Mitch in danger when Gwen's other personality, Mattie, means him physical harm. Meanwhile, Matt tries to confront his fear of sharks by going into a shark-infested part of the ocean with Summer.
Matt suffers from regular shark nightmares since a white killer shark has beens potted near Malibu. He still finds the courage to keep working, even at ope sea, and confront his fear by shark cage diving. Mitch enjoys the romantic attention of the mysterious Brown sisters, Mattie a glamorous flirt and Gwen a shy slob, but ignores they're disguised sides of paranoid lunatic until he's cuffed into a flooding basement.—KGF Vissers