Ami, a Japanese backpacker, and Jimmy work together at a KTV. They bond over work and adventures, but Ami leaves suddenly. Eighteen years later, Jimmy finds a postcard from Ami, sparking a journey to Japan to find closure and reconnect.
Zhang Qi-Mao's infant daughter was abducted. Framed and jailed during his search, he later discovers his daughter was used for organ trafficking. Consumed by grief and rage, he sets out for violent revenge.