An isolated house in deserted area is too remote for a servant, who leaves a note, quietly exits the back door, and puts the key under the mat. Alone in the house is a mother and her infant. A tramp watches the servant...展开leave, then begins to skulk. The woman sees him outside as he discovers the latchkey. She phones her husband, who's working in town, and he jumps into a car idling in front of his office. He races toward home while the car's owner (and the police) are in pursuit. The tramp grabs a knife and heads up the stairs toward the defenseless woman. Can the husband elude the police long enough to rescue her or will the tramp have his way?