Criminal investigator Su Tang is framed by her best friend, Zhao Min, for murdering a wealthy man’s lover. With the evidence stacked against her, she is sentenced to death. On the eve of her execution, with the covert help of prison guard Lu Zhao, she uses her final six hours to reexamine the overlooked details: injury photos hidden by forensic intern Chen Xue, transfer records between warden Zhou Yunsheng and Zhao Min, and even the files from a twenty-year-old case involving prosecutor He Ming. As the execution grounds ring with the dawn bell, Su Tang not only exposes the real culprit hiding in the shadows, but reveals to everyone that this death sentence was a carefully plotted game of revenge from the very beginning.