On a summer night in Jiangcheng, hardware store owner Song Jianshe and his wife Lin Meifeng were hospitalized due to poisoning from a handful of vegetables purchased online. Tests revealed that the food was not contaminated with pesticides but rat poison. Lin Meifeng thought her husband would be wrongly accused, so she wrote a confession and prepared to take the blame. The real murderer Zhou Hailiang was arrested and sentenced to fourteen years. The couple thought their nightmare was over.
However, another drug bag was found in the home, and the police restarted the investigation. A man who had been on the run for twenty years under different names emerged. In order to capture him, the police designed a "fake jailbreak" plan, but it accidentally got out of control. The couple hid in the basement and waited for unknown footsteps in the darkness.
A few months later, Song Jianshe saw a drama actor on TV. That face and eyes sent chills down his spine - he recognized that person. During the arrest, key evidence was reduced to ashes in a fire. Just as the suspect sneered and waited for release, the technical department extracted a fingerprint from the withered vegetable leaves and pulled out the third hand hidden in the dark.
The case came to an end, and the couple asked each other under the street lamp: "What would happen to us now if the fingerprint was not found?" The answer was hidden in the evening breeze.
