Tang Jia Cong and his mother lived together in the countryside since he was a child. He always believed that he was abandoned by his father because he knew that his father had another wife and children in Hong Kong. It was not until his mother passed away that Jia Cong could come to Hong Kong to reunite with his father. Xi's mother and her children complained that Jia Cong's arrival in Hong Kong had increased the burden of family life. After arriving in Hong Kong, Jia Cong was unable to adapt to the environment and could not find a job. The pressure and hesitation of life made him Christmas Eve was not peaceful in Christmas Eve, where everyone was celebrating. Jia Cong had a quarrel with Xi Ma. In a state of insanity, he accidentally killed Xi Ma and his father and kept them with their bodies all night. The next day, just as Jia Cong was about to dismember his parents' bodies, his sister came back. Jia witnessed everything, and Jia Cong had to kill someone to silence him.