In the fourth installment of the Tezuka Osamu Animation Theatre, embracing the theme of 'Saving our Fragile Earth,' Unico's mystical escapades mark the theater's first anniversary alongside Tezuka Osamu's profound message. Descending from the heavens, Unico, a unicorn youngster, encounters Tsubasa, a talking tree boy, while riding the north wind. The once thriving Earth now lies desolate, drained and ravaged by humanity's unchecked exploitation of its resources. Determined to revive the desolate planet, Unico and Tsubasa embark on a quest to restore its livability. After a grueling journey, they encounter the enigmatic Sphinx and a mysterious 'time fairy.' Together, they devise a plan to journey back in time and alter humanity's destructive course. However, their window to influence the future is limited to a mere five minutes. Can they change the destiny of Earth within this narrow timeframe? Thus commences their epic journey to heal the wounded Earth and reshape its fate.