Liu Li, a top medical student who is studying for a master's degree and a Ph. D., Had her mother Wang Ping deliberately murdered when she was a child. However, the murderers, Zhou Haixiong and his brother, were not severely punished for various reasons. This tragedy became an unhealable scar in her heart. Sixteen years later, Zhou Haixiong accidentally died in the bathtub. The scene was cruel, and the words "The time has come" were left behind. Liu Li, who has a medical background and a motive for revenge, subsequently became the police's number one suspect. He and criminal investigation team leader Lin Yanru started a complex game of justice, revenge and humanity, which also involved more interlocking suspense cases.
