A man receives a written death threat which says he will die at midnight. The play takes place in his locked apartment, with the only other character being the detective he hires to prevent the murder. The play unfolds in real time from eleven thirty five to midnight as the characters grow to trust each other less and less and try to predict and prevent the cause of death waiting for them at the play's finale. This radio drama is not only a suspenseful riddle, but also an escalating human scene exploring our fascination with death, the emotions that come in the face of death, and the power of a frightened imagination.