Black — an ice-cold mercenary and hired gun — wakes in a mysterious old asylum with no memory of his past. Under the guidance of his anonymous captor, "Red," he undergoes a strange form of treatment built around a unique technology: a headset that lets the wearer relive their memories and experience them anew in the present. And so Black tries to remember. With the help of the "Pandora" headset, he journeys into the depths of his own mind to uncover the truth behind the one thing he can still recall — the attempted rescue of a teenage girl with a bomb strapped to her chest.