After his sister Chen Sui died, Chen Yan found the thirteenth will in the freezer - a blood letter filled with family secrets. In order to uncover the truth about his sister's death, he restarted the investigation, but encountered the suppression of his father Chen Guodong, the plot of his younger brother Chen Zhao, and the secret assistance of his ex-wife Lin Man. Nanny Su Hui's silence makes every will a knife hanging over her head. When the fourteenth will quietly appeared, Chen Yan realized that his sister had already predicted that the murderer was among them.
