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.
| Actor | Role |
|---|---|
 Ron FosterDet. Scott Harper (as Ronald Foster) | Det. Scott Harper (as Ronald Foster) |
 Patricia BlairHolly Taylor (as Pat Blair) | Holly Taylor (as Pat Blair) |
 Harp McGuireDet. Murray Kearns | Det. Murray Kearns |
 John MaxwellInsp. Daniel A. Melrose | Insp. Daniel A. Melrose |
 Hugh SandersMartin Bender | Martin Bender |
 Helen KleebMrs. Melton | Mrs. Melton |
 Robert ShayneVictor Delmar | Victor Delmar |
 Douglas HendersonBarney Sawyer | Barney Sawyer |
| PPreston HansonTom Colton | Tom Colton |
 Ted KnightLt. Dan Ivers | Lt. Dan Ivers |