Lupin III: Lupin Ikka Seizoroi

After five years apart, Lupin gathers Jigen, Goemon, Fujiko, and the rest of his familiar companions at a villa on a private island. The reunion should be cause for celebration, but Lupin's unusually secretive behavior quickly makes his old partners suspicious.

The greatest mystery is a man in an iron mask who has been chained to a wall inside the villa. As everyone tries to understand why Lupin brought them together and what surprise he is preparing, the strange guest forces the group to confront a secret that turns their long-awaited reunion into something far less ordinary.