Doraemon and his friends have to rescue the people of Birdopia from the wrongdoing of vengeful former bird troopers before they unleash a wicked ancient dragon.

Nobita was reading a picture book.In that he sees Adam and Eve disobeying god and eating the apple in the garden of Eden. Nobita comments that their descendants have to face many difficulties because of Adam and Eve's mistake. Then Doraemon reminds Nobita that he had to do his summer vacation research homework.