Before getting married many people especially men are looking for one last night of freedom. They want to party and consider it their last chance to do something crazy. The Bachelor Part Vegas is a comedy about four friends who are looking for one last night out. The film was released in Australia under the title Vegas Baby. A group of longtime friends want to take their soon to be married buddy for one last outing in Las Vegas. Z-Bob, Ash, Eli, and Johnny plan the trip for their friend Nathan. They are going to show him a good time as his life as a single man is coming to an end. The movies features appearances by Kathy Griffen, Jamie Presley, and Daniel Stern among cameos by many others.
The friends hire a bachelor party planner name Mr. Kidd to take care of all the arrangements. While the men are thinking they are going to meet strippers, have some drinks, and gamble there is something else in store for them. Mr. Kidd is planning to rob a casino. That is just the beginning of a night of trouble for the guys. They are accused of robbing the casino and send the night on the run.
The friends manage to somehow run away from police and casino security. Their trouble is just beginning. They have an encounter with the Hell's Angels and somehow manage to get out of that situation alive. In addition to all of this they are stalked by the boyfriend of a porn star who is played with mixed martial arts champion Chuck Liddell. The group is also mugged by a female Elvis impersonator. There are many other things that they guys face but manage to get out of every time. The groups is also placed under arrest and are sent to jail. When things are finally looking really bad for the guys and it seems they are not going to survive the night they somehow do. One way or another they survive their Las Vegas adventures and Nathan is able to get married and put the night from Hell behind him.