Two years after that night in Vegas, Stu has found his soul mate and is getting married. With Phil, Doug, their wives and Alan, too, they travel to Thailand for the wedding. Feeling gun shy about any celebration, Phil convinces Stu to have one beer by a bonfire...which is the last memory of the night. Morning comes and Phil wakes in a seedy room somewhere to find Alan's head shaved, Stu with a tattoo on his face and a monkey. Luckily, Doug is safe back at the resort, but the bride's brother, Teddy is missing. Now the trio must retrace their steps through the streets of Bangkok...if they can remember any of it. Starring Bradley Cooper, Ed Helms, & Zach Galifianakis. Directed by Todd Phillips.