A reclusive American scientist, Sanderson, is working on an explosive capable of destroying the world, and a foreign spy-ring is after the formula. Federal agent Jack Lynch, who has been working on the case is murdered and his best friend, Bob Woods, heads west to investigate. A woman, searching Lynch`s room, flees when Bob and another agent, Wilson, arrive. From Dictaphone reports, Bob learns that Armand Recard, an international spy-for-hire, working with his wife, Vilma and Helen, the woman who was searching Lynch`s room, is about to acquire the formula. Wilson is also murdered and Bob pursues the case while learning something he didn`t know about Helen, the mystery woman, and also falls into the hands of a sadist named Mullins.