A good cast helps this sometimes unbelievable suspense film from falling on its face. Mentally unbalanced Baxter, with a cardiac condition, is taken into the home of her doctor, McKay. She becomes infatuated with McKay's married older brother, Bellamy. Although she pretends to want to
marry McKay and he her, she does her best to disrupt the household in the hopes of destroying Bellamy's marriage. MacMahon, the aunt of the two brothers, foils Baxter's plot.