This episode is set in the future 2011 where the main characters from Doraemon are all grown up and have kids. Minidora (mini doraemon) accidentally gets delivered to the Nobita's future house. The sons of Jyaiyan, Suneo and Nobita plays with Minidora with the special goods he brings out of his pocket. But trouble happens when they ran away from Dorami, who came to retrieve Minidora.

As Nobita, Shizuka, Gian, and Suneo are auditioning for a role in their school's play based on "Journey to the West", the coveted role of Son Goku is hotly contested. After suggesting that the real Great Sage Equal to Heaven should play himself, knowing that the story is only a legend, Nobita and Doraemon go back in time to find their own fake Monkey King, but arrive in present day with the story's demons having taken over the world. The only way for things to go back to normal is for Nobita and pals to reenact the tale...for real!