On a hot summer day, Demu Shanjun told his friends the story of "Treasure Island". Nobita (voiced by Ohara Huimei) was very excited, and boasted to Fat Tiger (voiced by Kimura Subaru), Xiaofu (voiced by Guan Zhiyi) and Shizuka (voiced by Kakazu Yumi) that he would find the pirate's treasure. Of course, in the end he still had to rely on his loyal friend Doraemon (voiced by Paddy Wasabi). Doraemon took out the secret prop "Treasure Island Map", and Nobita coincidentally found a new island with gold and silver treasures in the center of the Pacific Ocean. After that, the good partners set sail and headed all the way to the center of the Pacific Ocean. After the initial joy and excitement, a group of mysterious pirates stopped everyone. After a melee, Shizuka was also taken away by the other party as another girl. At the same time, Nobita and others rescued the boy Flock from that island (voiced by Yamashita Daiki). In order to save Shizuka, they tracked the traces of the pirates and crossed the vast sea...