Joe Graham (
Spencer Tracy), a troubleshooter for the telephone company, suspects that his beloved Ethel (
Constance Cummings) is working for a crook. Joe and his partner Casey (
Jack Oakie) investigate her boss, Dan Sutter (
Morgan Conway), but they're caught by Sutter's goons and left to die in a fire. Joe however is able to set off the alarm, saving their lives. When Sutter turns up dead, Ethel is suspected of his murder, but Joe and Casey are able to track down the real killer: Pearl La Tour (Judith Wood), Sutter's former girlfriend, who gives them a confession that exonerates Ethel. ~ Nicole Gagne, All Movie Guide