Tammy (Teng Liming) in The Lost World of Top Secret Files finds herself sleepwalking. She knows that she went out after falling asleep and brought back some things that don't belong to her. She is very shocked, but she can't remember what she did. Tammy goes to the Eye of Heaven Institute and asks Sam (Li Yaoxiang) to investigate her. At the same time, livestock were attacked by large animals on farms in the New Territories, and the mysterious man (Tao Dayu) appeared again and asked Sam to investigate the case. During this period, Sam discovered that it was a mentally abnormal human who attacked the farm, and found the Jaguar gene in his body. This person is a customer of Tammy's health food store. Tammy also has this symptom. Sam suspects that there is something wrong with a newly developed healthy food. After testing, it is confirmed that this food containing jaguar gene is temporarily incurable. Sam knew that Judy had taken this food, too, and hurried to Judy's house. But Judy (Fennie Yuen) has lost her virginity and bit her cat like a beast ...