What is the plot of The Beggars Opera?

The Beggar's Opera (1728) is a satire of Italian opera and its avid audience. It parallels the worlds of thieves, whores, and crime bosses with figures of the aristocracy and bourgeoisie.
Mr. Peachum is the boss of a group of highwaymen and whores. His daughter, Polly, has  married Macheath, a highwayman, so Mr. Peachum plots to kill Macheath, figuring he is worth more dead than alive and married to his daughter. Polly tries to hide Macheath, but he is duped by two of Peachum's accomplices, Suky and Jenny. Macheath lands in Newgate Prison under the control of Lockit, another accomplice of Peachum, and Macheath's situation is further complicated by his betrayal of Lockit's daughter, Lucy.  
With Lucy's help Macheath is able to escape prison but is soon recaptured and slated for hanging, with Peachum and Lockit dividing his assets. In the end, however, Macheath's life is spared and Polly and Macheath's marriage is recognized and celebrated.