18-year-old high-schooler, Oh Sehun, witnessed something he was never supposed to and as a result his life was targeted. He was wanted silent - dead. Terrified, he sought help and hid.

Edison Huang was a prodigy. A quick-witted NIS agent, the youngest to be accepted in at 20-year-old. One day, a peculiar case was ed upon his hands.

And the lives of the two became too tangled up together.