In order to investigate the mystery behind the death of his former colleague, border police officer Wu Ju accepts a special mission to become an undercover agent in the frontlines of a dangerous anti-drug operation.

Wu Ju (Zhang Danfeng) joins an undercover operation in order to avenge his comrade-in-arms who died in the anti-drug campaign. He approaches Qi Tian (Wang Xuan), the son of former drug lord Qi Tai (Mo Han), and gains his trust. Qi Tian believes that Qi Tai's former subordinate Wan Yanbin (Hai Yitian) is the culprit that killed his father. Wu Ju helps Qi Tian evade Wan Yanbin's pursuit and also learns that behind Wan Yanbin is a drug lord known as "Doctor" who is the real mastermind of the criminal organization.

Wu Ju makes it into "Doctor's" inner circle along with Qi Tian but he also becomes a target for police detective An Ning (Yuan Yuxuan) who is not aware that he is an undercover cop. With his courage and extraordinary wisdom, Wu Ju fights the most vicious domestic and foreign drug trafficking groups while experiencing the tests of friendship, love and life until the time he can finally destroy the drug cartel in one fell swoop.