An unknown artist hires Fuu for a private modeling session, but his passion for painting turns out to be a front for a human trafficking ring. Will Mugen crack the case in time to save Fuu from a life of slavery?

Jin, Mugen, and Fuu fall into the clutches of a hoard of rotting zombie treasure hunters. Next, they get blown to oblivion by an asteroid. Or maybe they just ate some bad mushrooms.

Old scores are finally settled as Mugen, Jin, and Fuu finally come face to face with the ghosts of their respective pasts.