Doug & Tracy are getting married and tow days before their marriage Doug’s two best friends Stu & Phil decide to have a 24 hour bachelor party in Vegas including Tracy’s unconventional brother Alan. The quartet rents the best suite in the Caesar's Palace and they go to the roof to celebrate. Next morning all are having a hangover and none realizes what happened last night and on exploration they find out that there is a tiger in the bathroom; baby in a wardrobe, chicken in a room, Stu has a missing tooth and Doug is missing. The trio decides to track down what happened last night and they discover that Stu is married to a stripper and they try to locate Doug so that they can bring him to marriage on time.