Prehistoricsand-dwellingsharksareunleashedontheislandofWhiteSandswhenanunderwaterearthquakecracksopenacraterdeepbeneaththeoceansurface.ThemostmenacingbeatstoeverrulethewatersnowrulethesandwiththeirmonsterappetitiestheymercillesslyfeastonanythingthatcrossestheirpathMarkAtkinsdirectsthissci-fi'creaturefeature'horror.Whenanunderwaterearthquakeopensupadeepcraterontheoceanfloor,aprehistoricbreedoflethalsand-dwellingsharksisunleashedupontheunsuspectingresidentsofWhiteSandsIsland.