Tian Yueyun, a survivor of Shanghai's 1930s Honghua Hui Triad, seeks vengeance for his brother Tian Xuefang's death. Consciously aware of his baldness – a stark contrast to his brother's sideburns – he conceals it beneath a heavy iron wig identical to Tian Xuefang's. His somewhat bumbling demeanor contrasts his deadly purpose. Constantly at his side is his loyal minion, He Machao, sharing his relentless quest for retribution. This pursuit defines their existence until encountering Erika Arendt, a protected Jewish refugee. Witnessing her plight profoundly moves them, leading Tian Yueyun and He Machao to abandon their path of vengeance entirely. This encounter marks a pivotal shift in their motivations and actions.