Solving the Case is Slightly Bitter, My Sister is Super Sweet.

Summary

Leon confronts Jia Bu Li, a high-ranking DGSE official, after a dangerous incident involving a spy escape. Jia, bloodied but composed, realizes the intent behind his kidnapping: to extract information about a comrade, Xie Zhi Peng, believed to be held in the 'Black Prison.' Despite Jia's attempts to negotiate for his child's safety, Leon ruthlessly kills him after extracting crucial information. Meanwhile, Lin Xuan, contemplating a plan to rescue Xie, encounters a man with the aura of the Police King at a fast-food restaurant. Their exchange turns deadly when Lin swiftly kills him, showcasing Lin's lethal prowess and the high stakes of their game.

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