In order to perform the play "Journey to the West" at the freshman welcome party, Nobita's class held a rehearsal for the play. Nobita (voiced by Noriko Ohara) wanted to be Sun Wukong, but he was just a villager. In order to prove that he was the most like Sun Wukong, Nobita used a plane to come to the Tang Dynasty of China, wanting to meet Sun Wukong, and he really met "Sun Wukong". Later, Nobita used Doraemon's (voiced by Nobuyo Oyama) props as a bet to prove that Sun Wukong was very similar to Nobita. Nobita and his friends came to the Tang Dynasty, but did not see Sun Wukong. So Nobita used Doraemon's simulation game console to pretend to be Sun Wukong, but was finally discovered. Because the machine was not turned off properly, the monsters in the game ran out of the game console. The monsters finally ruled the world, and Nobita and his friends were also in danger. In order to restore history and save Master Xuanzang, Nobita, Shizuka (voiced by Michiko Nomura), Suneo (voiced by Kenta Kantoku) and Takeshi Gota (voiced by Kazuya Tatekabe) disguised themselves as Sun Wukong and other characters to protect Master Xuanzang and embarked on an adventure... The story is adapted from the novel "Journey to the West".