Inspired by the extraordinary true story of Cui Daozhi, one of the pioneers of forensic investigation in China. Over six decades, he helped advance forensic science through his groundbreaking research into trace evidence and worked on numerous major and high-profile criminal cases. Having conducted more than 7,000 forensic examinations, he became known as the “Sherlock Holmes” of China’s criminal investigation field, renowned for uncovering decisive clues from the smallest traces.