An inventor announces he has a device which enables him to "tune in" on any historical event since the beginning of time. But the invention is a fake, so he hires The Radio Rogues to hide behind a screen and imitate the requested "voices." During the demonstration, observed by the local District Attorney who suspects the invention is a fake, the Rogues imitate the voices of Jimmy Durante, Ned Sparks, Fanny Brice as "Baby Snooks", Lionel Barrymore, Edward G. Robinson, Bing Crosby, Bob Burns, Jack Benny, Eddie "Rochester" Anderson, Ben Bernie and Charles Laughton. The hoax is exposed when an auto crashes into the room and knocks down the screen the Rogues are behind.