The film follows randy college boys Zack and Brian on a trip to Malibu for a party where there's a shortage of boys but a bevy of buxom girls. Beset on the way by car trouble, and various other distractions, the film also follows the journey of Zack and Brian's girlfriends, who follow the boys to Malibu but end up having their own lusty adventures.

Brian and Zack take off for a bachelor blowout in the City of Sin to celebrate Brian's last days as a man free of married life. Las Vegas offers them choices in every frame of desire and fulfillment, from erotic dancers and strippers to the bold and beautiful women who come looking for a good time. Little does Brian realize that his fiancée and her maid of honor are also looking for a little premarriage tension release, and are finding it in equally dishonorable ways.