On a quiet morning, Nobita, the clumsy yet endearing protagonist, receives a mysterious dinosaur egg he finds on his way. After some curiosity and with the help of Doraemon, his time-traveling robot, they discover that the egg is about to hatch. To their surprise, an adorable dinosaur, whom they name Pazu, emerges from the egg. Nobita decides to take care of Pazu and make him his new friend, but soon realizes that keeping a dinosaur in the city isn't so simple.
Driven by the need to help Pazu return to his proper time, Nobita and Doraemon embark on an exciting adventure that takes them to the era of dinosaurs. There, they encounter all sorts of prehistoric creatures and experience extremely funny and dangerous situations. However, the journey is not without challenges: Nobita will have to face his own insecurities and learn to be brave while protecting Pazu from other dinosaurs and the dangers of the ancient world.
Throughout this journey, Nobita and his inseparable friends will realize the true value of friendship, courage, and responsibility. With an unexpected and touching ending, the story becomes an exciting reflection on personal growth and the bond that ties Nobita to his beloved dinosaur, a lesson that will endure until the end.