Lupin III: Chi no Kokuin - Eien no Mermaid

Lupin is pressured by underworld boss Masae Toudou into stealing the Mermaid's Scale, a celebrated aquamarine offered at a secret auction. The heist succeeds, but Lupin quickly discovers that the jewel is a fake and that the real prize is tied to an old legend of Yaobikuni and eternal life.

The mystery soon becomes personal: the treasure is one of the rare targets Arsène Lupin never managed to steal. With Jigen, Goemon, and Fujiko drawn into the chase, Lupin follows a trail of paired jewels, assassins, and ancient secrets toward a treasure guarded by far more than locks and alarms.