Two years after the disastrous events in Las Vegas, it is now Stu's turn to walk down the aisle. Since his bride is from Thailand, Stu decides to hold the wedding there. Desperately hoping to avoid the mayhem of Doug's bachelor party, Stu chooses what he thinks will be a safe option: an alcohol-free, prewedding brunch. But this being Thailand, with Sophie, Phil, and Alan again in attendance. A "doctor", two lovebirds, and a man child is a recipe for disaster, and anything can happen.