A man, head of a trucking company, is loading suitcases into a station wagon while a man observes from the bushes. The man enters the house and reassures his wife that his testimony in Washington is necessary and that he is safe. Unfortunately, the man in the bushes has placed a package in the car that explodes on the way to the airport. His sister-in-law says they've had lots of trouble for the company lately and his wife volunteers to testify in her husband's stead. Frank must protect the widow as he searches for the killer and confronts the company's greatest rival.
