The sudden appearance of "Hell's Gate" -- a mysterious and seemingly impenetrable field -- wreaks havoc on Tokyo's status quo. But it also adds a new element to the city's social structure: psychics who possess supernatural abilities. The dangerous powers of these so-called "Contractors" are disturbing enough. That is, until one of them -- a killer known as the Black Reaper -- emerges as an even deadlier threat.

The sudden appearance of "Hell's Gate" -- a mysterious and seemingly impenetrable field -- wreaks havoc on Tokyo's status quo. But it also adds a new element to the city's social structure: psychics who possess supernatural abilities. The dangerous powers of these so-called "Contractors" are disturbing enough. That is, until one of them -- a killer known as the Black Reaper -- emerges as an even deadlier threat.

The sudden appearance of "Hell's Gate" -- a mysterious and seemingly impenetrable field -- wreaks havoc on Tokyo's status quo. But it also adds a new element to the city's social structure: psychics who possess supernatural abilities. The dangerous powers of these so-called "Contractors" are disturbing enough. That is, until one of them -- a killer known as the Black Reaper -- emerges as an even deadlier threat.

The sudden appearance of "Hell's Gate" -- a mysterious and seemingly impenetrable field -- wreaks havoc on Tokyo's status quo. But it also adds a new element to the city's social structure: psychics who possess supernatural abilities. The dangerous powers of these so-called "Contractors" are disturbing enough. That is, until one of them -- a killer known as the Black Reaper -- emerges as an even deadlier threat. Volume 6 includes episodes 23-26.