Plot: Natalie Blackstone and Hannah Whitehouse are your average teenage school girls, then suddenly they are thrown together to become the legendary warriors known as "Pretty Cure." Each entrusted with a Heartful Commune, a device that looks like a cell phone, and with their guardian protectors, Mepple and Mipple, Natalie and Hannah are able to transform into Cure Black and Cure White! Fighting the evil forces of the Dark Zone they find their inner strength relies on each other, with the power of friendship they are able to summon Black and White Thunder to create Pretty Cure Marble Twister! Cure Black and Cure White make it their duty to destroy the Dark Zone’s evil plans and save the world from evil! Find out by watching Pretty Cure!
In the Season Max Heart, the story continues after Natalie and Hannah defeat the Dark Zone, said goodbye to their guardians, and returned to their normal everyday lives. That is what they thought of course...
When one day they meet a mysterious girl named Hilary Melo, who turns out to be reincarnation of the Queen of the Garden of Rainbows. With no memory of her past, she discovers her powers are sealed away in the form of a "Heartiel." But as Cure Black and Cure White attempt to find the Heartiel, henchmen of the Dark Zone are protecting a mysterious boy who is suspected to be the reincarnation of the Dark King of the Dark Zone! When these new powerful enemies seem too tough to destroy, Hilary finds her inner power. With the help of the Prince of the Garden of the Light, Porun, and his younger sister Lulun, Hilary transforms into Shiny Luminous. Now that this duo is now a trio, can Pretty Cure stop the evil plans of the Dark Zone? Will the Dark Zone prevail and unlock the Dark King's reincarnations power and use them to destroy the world!?! You can find out by watching Pretty Cure Max Heart!