Prehistoricsand-dwellingsharksareunleashedontheislandofWhiteSandswhenanunderwaterearthquakecracksopenacraterdeepbeneaththeoceansurface.Themostmenacingbeatstoeverrulethewatersnowrulethesand;withtheirmonsterappetitiestheymercillesslyfeastonanythingthatcrossestheirpath MarkAtkinsdirectsthissci-fi'creaturefeature'horror.Whenanunderwaterearthquakeopensupadeepcraterontheoceanfloor,aprehistoricbreedoflethalsand-dwellingsharksisunleashedupontheunsuspectingresidentsofWhiteSandsIsland.