Due to her father's remarriage, robust 16-year-old Himeno Awayuki moves into a large mansion with a beautiful garden—the quintessential dream house for any girl her age. However, much to Himeno's disappointment, her new stepfamily doesn't really seem to like her, as her stepmother often occupies herself with her father, her younger stepsister Mawata ignores her, and her other stepsister—the equally aged Mayune—tries to prank her at every opportunity. But Himeno doesn't have time to dwell into thoughts of hopelessness—her new life has now become involved with a group of seven magical boys known as the Leafe Knights, after they ask her to become a magical princess who can borrow their powers! Although Himeno accepts their request and becomes the Prétear, she feels doubtful in her abilities to protect the world and its Leafe, the source of energy for all life. Will Himeno be able to find happiness among her new family and also save the Earth from the enemy, the Princess of Disaster?

Telegraph Pole Society, a mysterious group, is planning to conquer the world. The principal of the local high school forms a Defense Force by recruiting students from school: Shogi Morita, Kuho Tasuke, and Akiko Ifukube. Meanwhile the high school crazy scientist, Dr. Inogami, has turned a local boy, Kami Sanchin, into a cyborg. They might just defeat the Telegraph Pole Society with the help of the cyborg, or maybe not...

Announced at the "Pretty Rhythm Christmas -Prism Stage- Event," the movie will compile Prism Show scenes from all three seasons. Residents of the Prism World Momo and Penguin-sensei work together to introduce various Prism Shows throughout the history of Aurora Dream, Dear My Future, and Rainbow Live. Within the many Prism Shows performed by Aira, Mia, Naru and their friends, only ten rank on top.