Taking shelter from the rain, Suh Rin goes into a little cafe called Cafe Occult. Soon after leaving the cafe, she is hit by a car, and then a strange man pulls her down an alleyway. She is saved by a young man, and he takes her back to the cafe. There her fears are confirmed; she was killed by the car, and has now become a spirit. Cafe Occult, the Master, its 'errand boy' Young, are all mysteriously connected to both the world of the living and the spirit world. Suh Rin's spirit is wanted for a reason unknown, and only Young and his special bullets can keep her from their grasp.

At the beginning of the 21st century a sudden increase in genetic mutations cause some people to be born with special abilities. However, these enhanced humans are not welcome amongst the general population. As time goes by, they are marked for exile and shunned by society, resulting in a life of crime for many. As their special powers make them difficult to apprehend, the government joins hands with an unofficial, secret group of bounty hunters known as Peigenz. The Peigenz organization is filled with the most gifted and highly trained mutated individuals. Jay Berell, the heroine of the series, is a normal high school student. During a battle between Peigenz and a dangerous serial killer, Jay find herself caught in the crossfire. This triggers her special mutant abilities and leads to her recruitment into the Peigenz organization. (Source: Infinity Studios)

Mu-Sang has a quest... He must find and kill every "Gwi" that has ever existed. He is determined, and won't let anything get in his way, not even the imperial army! While traveling and searching for the remnants of Gwi, he meets a girl who also bears the same mark crossed out than he has. A fateful encounter? Were those two fated to meet? And why does he hold such a grudge against the "Gwi"...? All are questions left to be answered!