The film stars Kent Taylor, Louise Currie, Dennis Hoey, Larry J. Blake, Ann Doran and John Eldredge.

[1][2][3] Joan Summers (Louise Currie) enters the office of jewel merchant Montclaire closely followed by Kendal Wolf.

Detective Sharpe is still suspicious and so is the head of Jeweler's Indemnity, who puts two underworld men on to retrieve the diamond.

Kendal and Joan attend an exhibition of the Malabar diamonds, leave to follow a diamond-laden guest, overtake her car, shoot the chauffeur and slug the woman.

Two men and the robbed couple arrive and reveal the whole thing to be a hoax to test whether Joan will work with the gang and to assure them she was not the informer in the first theft.