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

Summary

The story follows a police investigation led by Lin Xuan into a criminal network involving a beggar gang. After tracking a suspect named Yao Yi through surveillance footage, they interrogate him and discover a leader named Yang Qiang. Three potential witnesses (Xu Ming Fei, Gan Lu Xue, and another person) are found murdered, drugged and killed with steel nails. The investigation reveals a complex criminal operation with systematic efforts to eliminate potential threats and cover their tracks. Lin Xuan and his team are determined to find Yang Qiang and unravel the full extent of the criminal organization.

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