Prehistoricsand-dwellingsharksareunleashedontheislandofWhiteSandswhenanunderwaterearthquakecracksopenacraterdeepbeneaththeoceansurface.Themostmenacingbeatstoeverrulethewatersnowrulethesand;withtheirmonsterappetitiestheymercillesslyfeastonanythingthatcrossestheirpathMarkAtkinsdirectsthissci-ficreaturefeaturehorror.Whenanunderwaterearthquakeopensupadeepcraterontheoceanfloor,aprehistoricbreedoflethalsand-dwellingsharksisunleashedupontheunsuspectingresidentsofWhiteSandsIsland.