Word is out that the "Hemingway Papers", the newly discovered last novel by the great author, tells the hiding place of a buried treasure on a desolate Mediterranean island. Lupin sneaks onto the island where, instead of treasure-hunting, he finds himself embroiled in a violent struggle for power. To Lupin's surprise, his old buddies Jigen and Goemon are also in the fight for their own reasons... (animenewsnetwork.com)