In 618 AD, the war between the human race and the bloodthirsty demon tribe has been going on for thousands of years. Humanity established a secret guard to deal with the demon tribe. During the long-term struggle, the demon tribe was also divided into two factions: one group integrated into human society and controlled the human economic lifeline, but also sought peaceful coexistence with the human race; the other radical organization tried to rule and enslave the human race and dominate the world.
Policewoman Fengdi Ge and Xiao Yunzheng are both capable members of the SWAT team. As partners, they have made many achievements through life and death, but their situations are completely different. Bagpipe Song is highly valued by Lin Pengyuan, the captain of the secret guard, and is always entrusted with important tasks. But Xiao Yunzheng was guarded and disliked by everyone because his mother was a demon and had half-demon blood. Just because he inherited the characteristics of the demon clan, if he loses control of his emotions as an adult, he will easily become a demon, lose his mind and become murderous. The secret guard's action plans were leaked repeatedly. The captain Lin Pengyuan was naturally suspicious of Xiao Yunzheng, and he was extremely cautious and cold-shouldered towards him.
Recently, a drug called "Burning Heart" has appeared on the market, which can increase human abilities dozens of times, but will burn itself to ashes once it is stopped. The leader of the secret guard plans to capture Yuan Qing, who is nominally the chairman of the largest group in Beijing, but is actually the matriarch of the demon clan.
Three years ago, Fengdi Ge had a relationship with Lu Mingsheng, a stunning man from the demon tribe. Unfortunately, the male-monster took a different path. Lu Mingsheng's identity as a demon forced Di Ge to avoid him and go to a foreign country. Di Ge, who returned to Shoujing this time, found that Lu Mingsheng had become Yuan Qing's lover.
The boss assigned Di Ge to arrest Yuan Qing, who was suspected to be a demon drug lord. Di Ge secretly sneaked into Yuan Qing's birthday party with his partner Xiao Yunzheng to investigate. However, during the operation to arrest Yuan Qing, he unexpectedly reunited with Lu Mingsheng, who had become Yuan Qing's lover. Unresolved feelings led to many misunderstandings. Later, in order to capture the real culprit behind the scenes and to rescue his former lover, Fengdi Ge and Xiao Yunzheng went to stop Yuan Jinghuang's conspiracy. A war between justice and evil was about to begin...
Mission: Justice will eventually defeat evil