Two fresh recruits at Japan's Narcotics Control Department are assigned to take down the criminal syndicate supplying the lethal drug known as Funny Angel (FA). While Haru Kurabayashi goes undercover in the mafia faction that sells the substance, his partner Kai Etou takes a job at a dubious greenhouse suspected of housing FA production. As both operatives draw nearer to their goal, they face tough decisions that risk blowing each other's cover.