The Wolfpack is back for a final fling...but this time there's no stag party or wedding. Following the death of his father, mentally troubled Alan (Zach Galifianakis) is accompanied by buddies Phil (Bradley Cooper), Doug (Justin Bartha) and Stu (Ed Helms) to an Arizona clinic.
However, the gang find themselves trapped in a war between old adversary Mr Chow (Ken Cheong) and his Vegas nemesis John Goodman.
This is the sort of movie where a giraffe is decapitated in the first five minutes. Yep, nuts.