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

Summary

In a shocking turn of events at a police station, Lin Xuan encounters a disguised female police officer attempting to attack him. With lightning-fast reflexes, he brutally neutralizes her, breaking her legs and interrogating her. The woman, Yuan Shan, reveals she's a professional raider sent by "Big Brother Gang" to potentially kill Bi Wen Hua. Lin Xuan deduces a complex revenge plot involving a group targeting individuals who committed past wrongs, with the police station potentially being used as a trap to track down the remaining targets.

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