Zheng Le, a Buddhist delivery boy who is kind to his core and firmly believes in the goodness of human nature.
His biggest worry in life is that he doesn't make enough money to donate to a rescue center for stray cats and dogs.
Until that day, Su Wanqing, his ex-girlfriend of Bai Yueguang who had been missing for three years, suddenly appeared in a wedding dress at the door of the villa where he delivered food, and gave him a strangely sweet smile.
Three minutes later, Su Wanqing mysteriously fell to her death from a thirty-story building. The only witness was a mobile phone she held tightly in her hand. On it was the last text message sent to Zheng Le: "Be careful, you will be next."
The dead Su Wanqing became "Experiment No. 1", And Zheng Le was horrified to find that strange "tags" began to appear in his eyes - words like game panels would float on the heads of those who approached him, marking their "human weakness" and "level of desire."
