This killer is a son-in-law这个杀手是赘婿

In the dark underworld, he was the King of Killers — the leader of the Wolf Organization, known as “Wolf King.” After a mission goes wrong, he is gravely injured and retreats back to Huaxia. To uncover the truth behind his parents’ past and fulfill his father’s dying wish, he becomes a live‑in son‑in‑law of the Feng family. From that moment on, he is no longer Wolf King, but Jiang Hao. A year ago, the underworld declared that the “Wolf King” had fallen in a failed mission. Now, hiding behind the identity of Jiang Hao, he conceals the fangs of the Wolf King in the city, and begins a狂气‑filled path of revenge and slaughter.