Bai Hua met Gu Yue by chance during his internship in the hospital, and the two young people became roommates in order to save rent. Strange things have happened one after another since Gu Yue moved in. There are always beggars following Bai Hua, strange women make inexplicable phone calls, and Gu Yue suddenly strangles her neck. Then more horrific things happened one after another. Dead bodies surfaced from the river one after another. The dead were all acquaintances. The anonymous email contained the four characters "Blood debt repaid with blood". Someone is pushing the Bai family's Bai's Pharmaceutical Co., Ltd. Into a desperate situation step by step. As Bai Hua's investigation deepens, the truth of seventeen years and the driving force behind the scenes gradually surface. . .
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