A woman has been sentenced to death by hanging. Her cousin believes she is innocent and he works against time to prove it before she is executed.
British diamond smugglers use the radiowoman (Phyllis Kirk) from a freighter docked on the Thames to unwittingly "mule" their swag, hidden in cigarettes, past customs, not knowing that she has befriended an Inspector for the Thames River Patrol.
Picking a pocket leads to blackmail and murder for a petty criminal in London.
