Black—a cold mercenary and gunslinger, wakes up in a mysterious and ancient sanctuary, with no memory of his past.Guided by the anonymous kidnapper "Red", Black undergoes a treatment plan supported by a unique technology—a headset that allows the user to relive their experiences and memories in the present.So Black sets out to recover his past.With the help of the Pandora headset, he travels deep into his mind, to discover the truth behind the only event he can remember: trying to rescue a teenage girl with a bomb strapped to her chest.