12 years in overseas, he comes back to hunting his prey. He killed because of old vengeance. His family was murdered. Mark has been saved by Johnny- an American man, who is also his father's business partner. Johnny trained Mark to be a professional killer to redeem his family's fate.

In the meantime, Mark has a paranormal disease. When his eye's retina exposed to the sunlight or light which is bright and sharp, he will be in an unknown dimension. Sometimes he traps in between two dimension- fantasy and reality. As a result, it is hard for him to distinguish which is right.