Trapped in a marriage with a man twice her age, Diane Parker's life plunges into chaos when her husband is run down in the street, and a stranger appears in her back yard. By nightfall, she is stalked by a killer and running for her life. Working as a waitress in a remote truck stop, Diane thinks she is finally safe until a stranger begins to frequent the cafe and Diane 's beloved employer suddenly dies. When the showdown comes, it is her loyal old dog she must rely on to save her life.