Build a movie plot around this: How do they get to Las Vegas? in Doug's future father-in-law's vintage Mercedes-Benz W111
The movie opens with Phil (Bradley Cooper) on the phone in the middle of the desert. He is calling the fiancee of his best friend Doug (Justin Bartha) and tells her that they messed up. "We lost Doug." The fiancee, Tracy Garner (Sasha Barrese), flips because she and Doug are supposed to get married in 5 hours. "That's not going to happen."Two days earlier, Doug and his soon-to-be brother-in-law Alan (Zach Galifianakis) are trying on tuxedos. Alan says it's OK if Doug doesn't bring him to the bachelor party tonight. Alan is severely socially inept but Doug makes it clear that he wants Alan to be there with him. Since they are going to be brothers soon, they have to look out for each other.Doug goes to talk to his father-in-law, Sid Garner (Jeffery Tambor), and is given permission to take his Mercedes to Vegas for the bachelor party since Sid remembers what it was like to be a young man. Doug thanks him and promises that he will be the only one to drive the car that day. Doug and Alan then leave to pick up the others.Phil is in front of a class of students reminding them to pay 90 dollars for a field trip to an observatory, which they all promptly pay. Phil then removes the $3500 from their envelopes and puts them into an envelope marked Vegas. He grabs his bag, ignores a student and jumps into the Mercedes. The group then goes to get their last member.Stu (Ed Helms), a dentist, is at home arguing with his girlfriend, Melissa (Rachael Harris), about the bachelor party. Stu tells her that they are going to Napa Valley for a wine tasting. Melissa is convinced, however, that Phil will find a way to find a strip club. Melissa treats Stu very badly, but Stu takes it with a smile and tries to kiss her but she won't have any of it. The guys arrive and Stu leaves with them.The group drives to Las Vegas and check into Caesars Palace. They try to decide how to pay and Phil volunteers Stu's credit card as the main payment method. Stu flips, telling Phil that Melissa would see the charges and realize that they went to...