Anpanman's friends go see a bubble show performed by Shabondama-hime and her Shabondama Girls, who make exquisite bubbles by playing their flutes. One of the girls, Purun, can't make big bubbles no matter how much she rehearses. She feels inadequate as she goes to retrieve her lost flute, which Creampanda finds and goes to return. Meanwhile Baikinman takes over Shabondama-hime's castle and steals the flutes, using their power to create evil bubbles, and Purun must realize her own importance and save the day with Anpanman's help.

Lupin is framed for the murder of Inspector Zenigata by a mysterious assailant holding a silver-coloured Walther P38 pistol Lupin himself once owned. Tracking the true killer leads Lupin to the island of the bloodthirsty Tarantula assassins inside the Devil’s Triangle. After joining the spider-tattooed army against their will, Lupin and his gang make both new friends and enemies as they not only plan to take home the Tarantulas’ massive gold repository for themselves, but hunt down the shooter from Lupin’s past. Can Lupin put to rest this demon who haunts his memories with the Walther P38?