After being dumped by his fiancé, heartbroken Hong Kong police officer Fallon Zhu gains 200+ pounds. His superiors demote him to the job of escorting convicts to Japan. When a convict in his custody mysteriously dies, he must team up with citizen Thor to solve the mystery.
Tang Ren and Qin Feng travel to Japan to investigate the death of a mafia head. As they suspect foul play, they engage in a battle of wits against foreign detectives.
