A Los Angeles Deputy District Attorney is sent to protect a woman who accidentally witnessed a Mafia murder.

A woman secretly witnesses the murder of her blind date for the evening by a top Mafia boss. She immediately goes into hiding without informing the authorities. When they finally catch up with her, she is unwilling to testify to what she has seen, but the Mafia are on her trail. Accompanied by a deputy district attorney, the woman boards a train travelling through a remote part of Canada. The Mafia know him but they have never seen her.—Rob Hartill

In Los Angeles, the editor of a publishing house Carol Hunnicut goes to a blind date with the lawyer Michael Tarlow, who has embezzled the powerful mobster Leo Watts. Carol accidentally witnesses the murder of Michel by Leo's hitman. The scared Carol sneaks out of Michael's room and hides in an isolated cabin in Canada. Meanwhile the Deputy District Attorney Robert Caulfield and Sgt. Dominick Benti discover that Carol is a witness of the murder and they report the information to Caulfield's chief Martin Larner and they head by helicopter to Canada to convince Carol to testify against Leo. However they are followed and the pilot and Benti are murdered by the Mafia. Caulfield and Carol flees and they take a train to Vancouver. Caulfield hides Carol in his cabin and he discloses that there are three hitman in the train trying to find Carol and kill her. But they do not know her and Caulfield does not know who might be the third killer from the Mafia and who has betrayed him in his office.—Claudio Carvalho, Rio de Janeiro, Brazil

A resourceful District Attorney (Hackman) must return a witness to San Francisco alive so she can testify in a trial. Carol (Archer) is in the bathroom of the hotel room of her blind date when he is murdered by mobsters for stealing money. Knowing she is the only witness, Carol flees to an isolated Canadian mountain home to hide out. She is followed by another man who knows that she is a witness and wants to make her testify.