A gemstone named the Mermaid's Scale appears in a secret, underground auction, and Lupin is coerced by the queen of the underworld into stealing the rock for her. Lupin however quickly discovers not only that the stone is a forgery, but that the real Mermaid's Scale is part of an unsolved riddle involving the mysterious girl Misa that leads to transcending mortality.

Lupin the Third: Blood Seal of the Eternal Mermaid

Jiantan is a young boy who has to leave Xi'an after the death of his mother to go deep into the Tibetan prairies to start living with the father he barely remembers. His dad, LaGeBa, is a busy doctor who decided to depart from the city and reside in Tibet where he is the essential physician of the poor community he lives in. To help his father, Jiantan has to learn how to herd sheep. While trying to learn his new responsibility, he is saved by a stray gold-colored Tibetan Mastiff. Both Jiantan and the big dog help each other as they try to adjust to this new environment.