On a rainy night, a body with a white balloon flower pierced through its chest drags Lin Shen, a former criminal-investigation prodigy who retired three years ago, back into the abyss.
The victim is a tycoon from Jiangcheng. Then another body appears, and another. The same flower, the same method of death, the same hatred: balloon flowers as the pact, murder as the prelude.
The killer taunts the police with pinpoint precision, calls out Lin Shen by name, and appoints himself judge as he settles a score of betrayal and bloodshed buried for twenty years.
An old case remains unsolved, and now the shadow of the killer has returned. Lin Shen joins forces with policewoman Su Wan to hunt down the murderer, tearing open the truth buried beneath lies, greed, and old wounds.
What he seeks is not just a serial killer, but also the darkness he fled from all those years ago, and justice that is twenty years overdue.
Every flower declares: the game has begun, and the guilty must die.
