Laxatives, suppositories, bloodlettings, and second and third opinions from the leading quacks are the order of his day—and hell on his wily, back-talking servant Toinette. His daughter Angélique is in love with the impoverished Cléante, but Argan wants to marry her to Thomas Diafoirus, a medical dunce who can assure his father-in-law a lifetime of health care. Cléante disguises himself as a music teacher to gain access to his love, but Béline, Argan’s mercenary second wife, threatens to expose them. A disguised Toinette, sage advice from his brother Béralde, and a faked death scene finally teach Argan where to place his trust. The play ends with Argan’s ceremonious, pig–Latin induction into the medical profession.