Mousetrap follows the lives of 3 escaped inmates and the emotional turmoil that proceeds in the aftermath of their prison escape. The story delves into the psyche of several characters as they cope with the impact previous decisions had on their current situation.

As the sun sets behind the eternal clouds of an apocalyptic world, a man and a woman become unlikely friends. Together, they battle the ruthless creatures that dominate the bleak landscape as they struggle with loyalty to the human race that left them to die.