A Mad World is the playwright's vision of Londoners in hot pursuit of money and sex. Two complex plots are awkwardly dovetailed, both involving a highly theatrical use of disguise. In the first Dick Follywit robs and outwits his snobbish grandfather, Sir Bounteous; in the second, Penitent Brothel, who is a man not a whore-house, schemes to have sex with Mistress Harebrain whose Puritan husband is possessed by Eros. Lefton's actors envisage these people as lovable rascals rather than as unfairly grasping, randy and guilt-ridden.