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"Season 1" tells the story: Nine strange murder cases, hiding nine special directional clues. Because the cases were so bizarre and disturbing, the murderers had not been brought to justice for many years, and information about these cases was strictly blocked by higher authorities. In private, the director of the provincial department ordered to secretly set up a special case team, vowing to solve the mystery. The members of the team include the captain who is good at reasoning and fighting skills; there is the genius of criminal behavior analysis who was personally recruited by the director of the public office; there is Gao Leng who specializes in criminal psychology; and there is the eccentric forensic doctor who is known as a genius. The four of them used their respective specialties to solve nine cases one after another, including Iron Rose inserted into the body, The Bride, Face Painting and Throat Cutting, Crazy Chef, Human Bone Collector, Bloodthirsty Boxing Champion, and Judgment Killer. These nine cases all skillfully used various "dark psychology" methods. The criminal psychology of each murderer is enough to make people frightened. As the quartet of detectives gradually deepened, they discovered a powerful criminal group that controlled criminal geniuses in various fields... "Season 2" includes a combination of four crime-solving geniuses and nine surprising cases. Criminal psychology methods are used in every case, and the criminal psychology of each murderer is enough to make people feel frightened. But behind these seemingly unrelated criminals, there is still a pair of invisible hands controlling... "Season 3" is a "special case team" established within the provincial department to specialize in solving special cases, strange cases, and crimes. Four masters from different fields: Lu Mingfei, an elite with extraordinary skills, Tang Hanyu, a psychologist with supernatural powers, Jiang Yunfan, a criminal behavior analyst with a good brain, and Yu Fengyin, a forensic doctor who is eccentric and unconventional, joined one after another to form a special and interesting team. Unity and cooperation are their professional qualities, and venomous remarks are their daily life...

A "Special Case Team" formed within the Provincial Public Security Department, specializes in solving special cases, strange cases, and banned cases. Four masters from different fields: Lu Mingfei, an elite criminal policeman with extraordinary skills, Tang Hanyu, a psychologist with supernatural powers, Jiang Yunfan, a criminal behavior analyst with the most powerful brain, and Yu Fengyin, a forensic doctor who is eccentric and unconventional, joined one after another to form a special and interesting team. Unity and cooperation are their professional qualities, and venomous remarks are their daily life...

Nine strange murder cases hide nine special directional clues. Because the cases were so bizarre and disturbing, the murderers had not been brought to justice for many years, and information about these cases was strictly blocked by higher authorities. In private, the director of the Provincial Public Security Department ordered the secret establishment of a special case team, vowing to solve the mystery. The team members include the detective captain who is good at reasoning and fighting skills; the criminal behavior analysis genius who was personally recruited by the director of the public office; the cold goddess who specializes in criminal psychology; and the eccentric forensic doctor who is known as a genius. The four of them used their respective specialties to crack nine cases one after another, including the Iron Rose inserted into the body, the Human Skin Bride, the Face Painted and Throat Cut, the Crazy Chef, the Human Bone Collector, the Bloodthirsty Boxing Champion, and the Judgment Killer. These nine cases all used various "dark psychology" methods skillfully. The perverted criminal psychology of each murderer is enough to make people frightened. As the four-person team of detectives gradually deepened their knowledge, they discovered a powerful criminal group that controlled criminal geniuses in various fields.

During the Republic of China, martial arts masters were scattered throughout the streets and alleys of Longcheng. Rumors of the secret treasure Linglong Picture gradually brought them together and attracted a large number of outsiders, including foreigners. Everyone wants to get Linglong Picture. Desire permeates the city. What followed was a series of martial arts battles. In a massacre that went unsolved decades ago, the only descendant was killed when he revealed the whereabouts of the secret treasure. The first batch of female forensic doctors who returned from studying abroad and could speak Cantonese were ordered to solve the case. They joined forces with the highly skilled police captain to clear away the grievances of their master, but failed to catch the real murderer... Since then, masters of the martial arts have frequently appeared among the people.

A "dead man" who was supposed to be sacrificed mysteriously appeared in the cemetery. He returned to Qingfeng City with Tang Hanyu, the leader of the special case team, but he was not involved in solving the case as an Interpol. Is Mr. Shen suspecting something? What shocking secret does this person carry? After "Iron Rose" was successfully arrested and imprisoned, how should his crime be determined? What role will he play in subsequent cases? Does he really have a successor? The members of the special case team never expected that although "Iron Rose" had been arrested, many strange murders would still occur one after another. They originally wanted to rely on the evidence provided by the returning Ling Feng to uproot the forces behind the "Iron Rose" at once, but as they continued to investigate further, they found that murderous intent was everywhere. This is a battle between justice and evil on the surface, an invisible showdown between undercover agents and anti-undercover agents. What is the final outcome? Who died suddenly and mysteriously in prison? Can the special case team catch this mole?