Jon Trachtman and Leslie Arthur are out of work musicians who room together in New York City. To save money, Jon has been filing tax returns listing the pair as married. The day of reckoning comes when the Internal Revenue Service informs the “couple” they’re going to be investigated. Leslie masquerades as a housewife, aided by Jon’s fiancée, Kate. Complicating matters further, Leslie and Kate are having an affair behind Jon’s back, Jon’s mother drops in unexpectedly to meet her…