Chan, a Taiwanese gangster entrenched in Taipei’s criminal underworld, abandons his self-serving pursuits after forging a pivotal alliance with Genichiro Ryu, a survivor of Japan’s catastrophic collapse. His shadowy past, shaped by underground networks, remains shrouded in mystery, yet his trajectory shifts decisively when aiding persecuted Japanese refugees in Taiwan.

Tasked with unraveling the murder of a Japanese woman and child, Chan collaborates with Genichiro and Ryoutarou Hata, a Taiwanese-Japanese detective. Their investigation exposes a political conspiracy: ultranationalist officials stoking anti-Japanese violence to consolidate power. Chan’s street-smart pragmatism clashes with Genichiro’s idealism, though he increasingly embraces non-violent tactics to dismantle systemic corruption.

Risking his underworld ties, Chan orchestrates Genichiro’s covert return to Japan, navigating its fractured territories to reunite him with family. Their bond deepens into brotherhood, anchored by a shared mission to protect refugees and destabilize corrupt regimes. Despite his criminal instincts, Chan’s resourcefulness proves vital—brokering intelligence, evading surveillance, and manipulating dangerous alliances.

His evolution from cynical survivalist to collective advocate unfolds abruptly, bypassing gradual introspection. Yet his actions catalyze reconciliation between displaced Japanese and Taiwanese communities, dismantling engineered divisions while confronting those who exploit societal fractures for power.