Tim Hanley, an American agent, posing as a lawyer with the United States Embassy in London, and Reggie Oliver, a Scotland Yard detective, posing as a music critic are both keeping their eye on Carla Nillson, a famous singer, whom they suspect of espionage. They all meet in London, then in Lisbon, and eventually in New York City, where Carla sings on the radio.
| Directing | Tim Whelan | Director |
| Production | Edward Small | Producer |
| Camera | Hal Mohr | Director of Photography |
| Writing | Howard Estabrook | Screenplay |
| Writing | E. Lloyd Sheldon | Story |
| Writing | Jack DeWitt | Story |
