In 18th‑century London, a destitute beggar is dumped into Newgate prison beside a pile of papers bearing the fragments of an unfinished opera. He proclaims to his fellow inmates that his tale is about a real highwayman, Captain Macheath, a dashing figure who in the story wears a red coat, wields pistols in both hands, seduces women with a haunting five‑note tune, and seems to ride luck as if fate itself were a game. The other prisoners scoff, pointing out that the hero is among them, shackled and awaiting execution the next morning. The beggar, eager to prove his creation, tempts Macheath to sing, and the singer’s strong voice lends life to the page—so much so that the beggar urges him on, turning his own imagined opera into a shared performance for the jail. Macheath, who is scheduled to die, concedes that there is “no arguing with reality,” and yet he begins to perform, inviting the beggar to keep the music going as the tale unfolds. Captain Macheath (as the bold highwayman) becomes the center of a longer, interwoven story that begins inside the walls and spills out into the world beyond.
The tale quickly widens its circle: as Macheath rides toward London, he robs a carriage, steals a kiss, and takes a locket from a maiden. Back in the city, Polly Peachum, Dorothy Tutin and her parents, shopkeepers Mr. Peachum and his wife, Mrs. Peachum, are shocked to learn from their servant Filch that Polly has secretly married the highwayman. Exploiting the situation for profit, Polly’s parents scheme to lure Macheath into a trap and collect a handsome reward for his capture. The tension thickens as the couple’s romance collides with the parents’ desire to profit from his downfall, setting up a web of coercion, loyalty, and cunning. Polly’s father and mother—George Devine as Mr. Peachum and Mary Clare as Mrs. Peachum—drive the push for a treacherous bargain, while Polly clings to her defiance and love.
Outside the town, Macheath encounters a carriage driven by Newgate’s jailer, Mr. Lockit, his daughter Lucy, and the wily Mrs. Trapes, with Lockit wending a courtship that complicates the road ahead. Lucy, Daphne Anderson, who once met Macheath in jail, reproaches him for taking her virtue without so much as offering a promise to wed. Mrs. Trapes suggests that Lucy betray Macheath in exchange for money, planting the seed of a turning point that will ripple through the rest of the story.
Later, in a hayloft, Polly warns Macheath that an ambush awaits him. He escapes with Polly’s help after a swift, swashbuckling victory, then hides in a back room of a tavern and lingers among the women there, whom he regards as friends. But the danger closes in: Jenny Diver, a prostitute bribed by Polly’s parents and Lockit to betray him, collaborates with others to seize the highwayman. The moment of capture comes swiftly as Macheath’s luck falters and the jail’s iron gates close on him again.
From his cell, Macheath pleads with Lucy to steal the keys and free him, promising to marry her in return. Polly arrives and, in a tangled moment, he is forced to introduce the two women to one another. During the night, Lucy graspes the moment, steals the jail keys, and releases him, but Polly returns to discover that Macheath is gone and screams in anguish, drawing the guards’ attention. The fugitive, meanwhile, disguises himself in the stolen cape and gloves of a lord and slips into a gaming house to avoid fulfilling his pledge to Lucy. The proprietor recognizes the cape and alerts Lockit and Peachum to the impostor’s presence. Back in custody, Polly is accused of freeing Macheath and is locked in Lucy’s room, where Lucy tries to drug her to cover her own tracks.
When they hear that the real Macheath has been recaptured and brought back to prison, Lucy and Polly hurry to his cell and demand that he choose between them. He refuses, claiming that with execution looming, there is little point in breaking promises. The next morning, Macheath rides atop his own coffin as it is carted through the streets toward the gallows, briefly lifting a farewell wave to the cheerful crowd before the trap closes and the opera seems to end on an incomplete note.
Yet the curtain never truly falls. The real Macheath, still behind the prison bars, protests that he should not hang twice, and the beggar—ever the curator of this meta‑story—requests a reprieve. The other prisoners join the call, mob the turnkey who comes to investigate, and create enough mayhem for Macheath to slip free once more. The highwayman steals a horse from the coffin‑bearing cart, escapes beyond London, and, under a chorus of freedom found, proclaims that his liberty has been restored because of a beggar’s opera. The tale, meant to be finished in tragedy, ends instead with a defiant note of escape and a lingering question: did art free him, or did reality merely grant him another chance?
