Hana Nono is a middle school student who encounters a baby named Hugtan and her guardian, Harry, who fell from the sky. Hana learns that they have been pursued by the evil Criasu Corporation, who wants Hugtan's Mirai Crystal and change the present. Protecting Hugtan causes Hana to gain her own Mirai Crystal and transform into the Pretty Cure of High Spirits, Cure Yell.
(Source: Toei Animation USA)