The orphan Mandy Lane is a beautiful, virgin and pure teenager raised by her aunt, desired by her schoolmates and a close friend of the outcast Emmet. After the death of their high school mate in a pool party, Mandy befriends Chloe, Marlin, Red, Bird and Jake. Red invites the group for a weekend party in the isolated ranch of his family, with all the boys disputing who would succeed in having sex with Mandy Lane. They meet the henchman Garth that takes care of the ranch and he asks the group to go easy on the drugs and booze.

Synopsis: Mayhem commence par un accident de voiture sur une autoroute de Los Angeles. Un lieutenant de police lui confie un de ses flics, Brandy Martinez, pour aller dinfiltration. Sa mission: ver sa place dans le syndicat de vol de voiture qui est derriere la SmashUp. Comme prevu, cest une voie dangereuse, mais elle parvient a acceder a lun des plus grands groupes du crime. Elle se rend vite compte, toutefois, quil ny a plus grand, plus menacante, les questions a portee de main.