Obstetrics director Henry Carter discovers his future daughter-in-law Lydia Shaw has syphilis. She responds by assaulting, humiliating, and forcing him to kneel before destroying his trophy. Protected by her wealthy fiancé, Lydia terrorizes everyone. Henry Carter patiently waits, then exposes her affairs, infection, and lies at a birthday banquet and hospital ceremony. Lydia and her lover turn on each other, leading to murder. She ends up in prison, where justice finally prevails.