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

Summary

Lin Xuan, using his exceptional eyesight, scrutinized a villa multiple times, suspecting a genius adversary had hidden surveillance devices. After hours of searching without finding anything, he decided to fill a blood-stained bathtub with water, shocking his team. While cleaning, he discovered an infrared temperature sensor that could detect if someone had entered the tub. Further investigation revealed a specially made one-way mirror concealing a pinhole camera. Lin Xuan's team found numerous hidden devices, indicating a highly intelligent murderer, likely Zhao Qiang. Despite uncovering this, they realized they were still unable to locate the culprit, highlighting the cunning tactics used against them.

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