Hugo Haas himself plays railroad dispatcher Jan Horak, who succumbs to the charms of Betty (Beverly Michaels). Upon hearing that Horak has a few thousand dollars salted away, Betty inveigles him into marriage. Soon bored by her new husband, Betty inaugurates an affair with Horak’s studdish assistant Steve (Allan Nixon). Because Horak is going deaf, Betty and Steve freely discusses their plans to bump off the old man and abscond with his dough. But Horak isn’t quite as hearing-impaired as they think he is.