Ten
years ago, an inscrutable and abnormal territory known as Hell's
Gate appeared in Tokyo
and altered the sky and decimated the landscape. The heavenly bodies
disappeared, replaced by false stars. At the same time, people who
possess various special abilities emerged. Kept secret from the
knowledge of the masses, these individuals, known as Contractors, are
able to murder in cold blood. Various nations around the world use
Contractors as spies and agents, often resulting in violent battles for
information. Each fake star has a corresponding contractor, and they
vibrate when their contractor's power is being used. As such,
contractors are usually identified by their star's Messier catalogue
number.
However, their abilities are gained at the edge of their humanity. They
lack human emotions, especially aversion to killing. Contractors
usually work for one of various rival Syndicates as spies and
assassins, although the ultimate purpose of the Syndicates is unknown.
