A young woman awakens to find herself trapped inside a garage. In this small space, an automobile emits carbon dioxide which is saturating the place. The unknown stranger holding her prisoner, knows everything about her, her past and about the most important thing to her in the world: a young daughter waiting for her at home. The reason for her imprisonment is not revealed. Only the amount of time left to save herself. The woman fights like a tiger but there is no way out. She asks for help through her cell phone. But time is needed to track her down…and time is running out, as the oxygen surrounding her. The only way to survive is by sacrificing the life of a small boy locked inside the trunk of a nearby parked car. She should take and use the gas mask he is wearing until the garage door is opened. The boy is terminally ill with little time left to live. Although she would never sacrifice an innocent life for her own, her sense of self-preservation is such that she finally gets hold of the mask, using it only for a mere instant until she is finally overcome by a sense of guilt. The woman realizes the stranger did not choose her at random. In her past there was a failed suicide attempt. The mentally disturbed stranger is offering a second chance to all those who have despised life by attempting to take it. The woman, however, now wants to live, but the stranger is insensitive to her pleas for mercy. Knowing that the end is near and shaken by physical pain, the woman attempts to use a pistol, found in the glove box, against herself. But she is unable. Time runs out and the woman dies. The garage door opens and the unknown man enters the garage in order to release the child: his son. Terrified and exhausted from being a tool in his father’s hands, the child shoots him dead. Now he can leave the garage, a free person.