Two days before his wedding, Doug drives to Las Vegas with his best buddies Phil and Stu and his future brother-in-law Alan, for a blow-out bachelor party they vow they'll never forget. But when the three groomsmen wake up the next morning with pounding headaches, they can't remember a thing. Their luxury hotel suite is beyond trashed and the groom is nowhere to be found. With no clue about what happened and little time to spare, the trio must attempt to retrace their bad decisions from the night before in order to figure out where things went wrong, in the hope of finding Doug and getting him back to L.A. in time for his wedding. But the more they begin to uncover, the more they realize just how much trouble they're really in.

• Map of destruction - Re-trace each step the guys took during their fate-filled evening and see the real loactions, learn about their Las Vegas lore and see the filming that took place there.
• Three best friends song - Bradley Cooper, Ed Helms and Zach Galifianakis "freestyle" their own song.
• Gag reel