Mark Williams, an old master thief, that Lupin teamed up in the past. After Mark past away, he left a dying wish for Lupin. In order to obtain the Trick Diamond, Lupin must return 6 of Mark's stolen valuables to their original spots. Only then will Lupin be able to learn the location of the Trick Diamond.
Rupan sansei: Otakara henkyaku dai-sakusen!!
Lupin is given a job to return 6 treasures to their original areas for an old friend of his, so Lupin can receive an even better treasure to gain.
