The king of assassins from the dark world, the leader of the Wolf Organization, the “Wolf King,” fails a mission and returns to China severely injured.

In order to investigate his parents’ background and fulfill his father’s last wish, he becomes a live-in son-in-law of the Feng family.

Now, he is no longer the Wolf King, but Jiang Hao.

The former “Wolf King” was declared dead by the dark world a year ago after his failed mission. Now, under the identity of Jiang Hao, he hides in the city, launching a ruthless campaign of revenge and slaughter.