While investigating a diamond heist, disgruntled cop Harper falls for Holly, the top suspect's main squeeze. When she convinces him to kill her boyfriend and make off with her and the loot, they start down a treacherous path full of dark surprises.
Ron Foster
as Det. Scott Harper (as Ronald Foster)
Patricia Blair
as Holly Taylor (as Pat Blair)
Harp McGuire
as Det. Murray Kearns
John Maxwell
as Insp. Daniel A. Melrose
Hugh Sanders
as Martin Bender
Helen Kleeb
as Mrs. Melton
Robert Shayne
as Victor Delmar
Douglas Henderson
as Barney Sawyer
Preston Hanson
as Tom Colton
Ted Knight
as Lt. Dan Ivers
