Undercover police officer Gan Tianlei spent over a decade infiltrating a drug cartel before an explosion left him comatose for eight years and robbed him of his memory. After waking, he ventures into the gray underworld once more, carrying only fragments of his memories, to solve an unsolved case and protect his daughter. He navigates the forces of the Caesar Group and the Tan family. Told in a realistic style, the series portrays the restraint and sacrifice of anti-drug officers. Amid high-stakes clashes between good and evil, it conveys an unwavering resolve to fight drugs and the sense of duty borne by the police.
