The narrative begins when Nobita, yearning for a grand adventure, takes pity on a stray, unkempt dog named Peko and brings him home. Unbeknownst to Nobita, Peko possesses
extraordinary human-like intelligence and a mysterious background. Through a series of comedic yet resourceful mishaps involving Doraemon's futuristic gadgets, Peko reveals his true identity: he is actually Prince Kunckle, the rightful
heir to the throne of a hidden canine kingdom located deep within the uncharted jungles of Africa.Driven by a sense of duty and a longing for excitement, Nobita, Shizuka, Gian, and Suneo agree to accompany Peko back to his homeland to help him reclaim his throne. Upon arriving in the dense, perilous jungle, the group encounters the tyrannical dog-dictator Daburanda and his ruthless general, Boosup, who have usurped power and enslaved the canine populace. Motivated by greed and a desire to exploit the mythical, giant stone statues imbued with ancient supernatural power, the regime poses a lethal threat to the kingdom and the visiting children.As the friends navigate treacherous terrain, lethal traps, and hostile guards, their loyalty and courage are tested to the absolute limit. Gian, initially boastful, learns the true meaning of bravery, while Nobita discovers inner strength he never knew he possessed. The tension escalates dramatically when the group is cornered by Daburanda’s forces, leading to an epic, high-stakes confrontation. Doraemon utilizes his most powerful gadgets to level the playing field, but the tide truly turns when the legendary giant stone statue awakens, responding to the pure hearts and resolute determination of Prince Peko and his loyal human allies.In the climactic battle, the oppressive regime is utterly defeated, and Daburanda is overthrown, restoring peace, freedom, and legitimate rule to the canine kingdom. With their mission triumphantly accomplished, Nobita and his friends must bid a bittersweet farewell to Peko and return to their ordinary lives in Tokyo. Though they must keep their incredible journey a secret from the adult world, the children return forever changed, carrying the profound bonds of an unforgettable adventure that bridged two different worlds. The story concludes on a heartwarming note, with Nobita looking out his bedroom window, fondly remembering the brave prince who taught him that true courage comes from standing up for others, no matter how daunting the odds may seem.