| Director | Robert Aldrich |
|---|---|
| Budget | $100,000 |
Mike Callahan is an Irish national and war veteran working in Singapore as a private detective. He takes a case from a former flame, now a nightclub singer, who suspects that her husband Julian March is involved in criminal activities.
Callahan learns that a man named Alexis Pederas has involved Julian in a plot to kidnap prominent nuclear scientist Sean O'Connor and hold him for ransom to the highest bidder. O'Connor is one of only four men in the world who knows how to detonate the hydrogen bomb.