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

Summary

In City J, Province Z, Lin Xuan and Guo Xu investigate a suspect's parents. They confront an elderly man, who denies knowledge of his son and exhibits hostility. Lin Xuan discovers a significant amount of cash hidden in the apartment, raising suspicion about its origin. He reveals that the money likely comes from horrific crimes involving children, shocking the old man. As a granddaughter arrives, Lin Xuan warns of potential retribution. Suddenly, they notice someone observing them from across the street, prompting Lin Xuan to break through the window and pursue the figure.

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