From the director of OLD SCHOOL comes a new comedy about a bachelor party gone horribly wrong. Two days before his wedding, Doug (Justin Bartha) and his three buddies (Bradley Cooper, Ed Helms and Zach Galifianakis) drive to Las Vegas for a blow-out night they'll never forget. But when the three groomsmen wake up the next morning with pounding headaches, they can't remember a thing. Their posh hotel suite is beyond trashed and the groom is nowhere to be found. With no clue of what happened and little time to spare...