Jimmy provides a very specialized service. He is paid to be the best man at weddings for awkward loners who don't have any friends. He stands by grooms on their wedding day so they won't feel like lonely losers. Doug is one of those awkward loners who needs Jimmy's services. The problem is he has lied about his best friend's name, which now has Jimmy trying to follow along with the lies, and has created nine groomsmen too. After selling this lie to his fiance, Doug now needs Jimmy to help strengthen this house of lies. If it falls, it dooms Doug to losing the love of his life.