Kan Yiu-yeung, Ku Ka-keung, Kiu Po-po and Kiu Tai-nam were once CTRU’s Formidable Quartet. An incorrect decision in an operation caused the breakup of their friendship. And the quartet went their separate ways. Fast-forward to the present and an indiscriminate homicide again brings the quartet together. But there are still certain unresolved issues between themselves. POTT is Counter Terrorism Intelligence Cadre’s other elite task force. Team leader Fong Kwok-hei admires Po-po and asks her to become her subordinate. Team member To Siu-jie fancies her partner Yiu-yeung and finds out Po-po is Yiu-yeung’s ex-lover, so she “starts a war”. Successive explosions happen in the city. While investigating, Po-po asks prisoner-cum-hard criminal Dr. Hong’s for help, and the process is surprisingly easy. Actually, Dr. Hong has some trick up his sleeve.
To be a human, you must eat your brain, and to be a zombie, you must "eat your brain"! Fei Qingyu Yangguang was shocked to find that his body was abnormal, and ran to the mortuary with an abnormality. In front of his friends, forensic intern Gu Deming and Taoist Warren, he ate bloody human brains! From then on, when the sun eats other people's heads, they will have their memories and skills. One day, Sunshine was so hungry that he wanted to eat the head of Mo Xiaochun, the daughter of the Sparrow House. The two did not know each other. After Sunshine became a brain-eating zombie, he experienced various wonderful lives through the heads of others, and finally realized after the experience, determined to protect the family-owned hot pot restaurant. At this time, uncle Yu Guo was fascinated by the sun, and revealed the secrets of the Yu family, and a zombie disaster was imminent...