After a 1963 prologue showing British executioner Harry Wade at work, hanging a man, Hennessy, who goes to his grave proclaiming his innocence and pronouncing a curse on Harry, Hangmen flashes forward to 1965 in a town in northern England. The action centres around Harry, who we discover is the second-best hangman in the land. Harry owns a pub that he also lives above with his wife, Alice, and his fifteen-year-old daughter, Shirley. Harry is contending with the abolition of hanging in Britain while the pub is filled with cronies and sycophants, as well as a journalist who is trying to interview Harry about the abolition. Despite continually protesting that he has nothing to say on the record, Harry eventually takes the journalist upstairs and gives him an extensive interview, complete with disparaging remarks about the number-one hangman in England, named Pierrepoint. A smiling but menacing stranger named Mooney comes to the pub and stirs up some trouble, causing consternation among Harry and his cronies. Mooney inquires if there are any rooms about to let, and Alice offers him a room upstairs. But when Alice tries to call his references, Mooney explodes. Mooney also creepily flirts with Harry's daughter, Shirley, who later appears to go missing.
Over the next day or so, Mooney toys with Harry and leads him and his wife to believe that Mooney has kidnapped their daughter, Shirley. We learn that Mooney is in cahoots with Syd, one of the men in the bar and Harry's assistant hangman whom Harry has always treated with contempt. Syd is conspiring with Mooney to take Harry down a peg, but it becomes clear that Mooney may have more on his mind than just scaring Harry. Mooney's taunting eventually pushes Harry and his cronies to put a noose around his neck and stand him on a chair to force him to reveal Shirley's whereabouts. Suddenly, Pierrepoint, the best hangman in England, storms into the bar to confront Harry about the disparaging remarks Harry made about Pierrepoint in the paper. This forces Harry and his crew to hide the now choking Mooney behind a curtain. When Pierrepoint eventually leaves, Harry and company discover Mooney has been hanged behind the curtain, which was apparently Mooney's goal all along. Shirley returns to the bar, completely unharmed. The play ends with Harry and his friends soberly reflecting on what they have done, while Harry is also forced to deal with the justification of the hanging he performed at the very beginning of the play.
The play is directed by Matthew Dunster, with fight direction by Kate Waters,[14] design by Anna Fleischle,[15] lighting design by Joshua Carr[16] and sound design by Ian Dickinson.[17] Following its premiere production the play transferred to the West End's Wyndham's Theatre, where it began previews on 1 December 2015, with its official opening night on 7 December,[18] booking until 5 March 2016.[19] A typical performance ran two hours and thirty minutes, including one interval.[12]
The play was scheduled to open on Broadway at the John Golden Theatre on 19 March 2020, but the run was cancelled because of the COVID-19 pandemic after thirteen previews.[24][25] In February 2022, it was announced that the play was once again scheduled to premiere at the John Golden Theatre on 21 April that year, with previews beginning on 8 April. The production saw most of the 2020 cast return, with the exception of Dan Stevens as Mooney, Mark Addy as Harry and Ewen Bremner as Syd, replaced respectively by Alfie Allen, David Threlfall and Andy Nyman.[26] The production closed on 18 June 2022.[27]