They never imagined that an ordinary hunter exam would change their lives. He, Qi Ya, was originally just a talented, completely emotionless killer. He, Xiaojie, is a kind, simple-minded and optimistic young man. In order to get rid of the constraints of his relatives, a man stabbed his mother and brother, ran away from home, and took the hunter exam in search of opportunities. A man embarks on a hunter exam to find his father. In this way, two teenagers who had never crossed paths met and became good friends. But they believed in each other time and time again, sacrificed themselves for each other time and time again, and fought despite difficulties time and time again just to be together. Only then did they realize that maybe they were not just friends...