On the eve of his execution, Qi Yan, a prisoner on death row, reversed the balance of justice with a fingerprint found in a wall. Criminal investigation captain Shen Lin quietly launched an investigation into an old case, but he uncovered the truth hidden by forensic archivist Chen Suzhen, judge Zhou Huaixu's self-destructive obsession, black market fingerprint artist Lin Xiao's pain of betrayal, and an unknowingly tattooed girl who held key evidence. When fingerprints become weapons, justice is no longer written on paper, but recast in blood and fire.
