Two realms exist in the ancient land of Yanato: the Lofty Realm, where gods reside, and the Lowly Realm, where humans reside. Princess Sakuna was the daughter of the god of war and goddess of harvest, but she led a lazy life. One day, she is banished to Hinoe Island, the Isle of Demons. Stranded in a barren land, Sakuna sets out to slay demons and farm rice. Her new adventure begins!

Zombie Land Saga: Yumeginga Paradise builds upon the original TV series' unique setting with an expanded scale. The idol group Franchouchou, which initially set out to revitalize a region, is reborn in this film as a symbolic entity carrying the future of the Earth. While preserving the quirky charm of zombie idols, the film’s direction is more dazzling, suited to the theater screen. In particular, the climax's live performance scene introduces new potential in idol anime by seamlessly blending music and drama, offering both laughter and heartfelt emotion.

Twenty-six-year-old Hiroto Suwa; his wife, Naho; and their old high school classmates—Takako Chino, Azusa Murasaka, and Saku Hagita—visit Mt. Koubou to view the cherry blossoms together. While watching the setting sun, they reminisce about Kakeru Naruse, their friend who died 10 years ago. Mourning for him, they decide to visit Kakeru's old home, where they learn the secret of his death from his grandmother.

菜穗（花泽香菜 配音）是一名普通的高中二年级女生，过着波澜不惊的平淡生活。一天，菜穗收到了一封神秘的信件，寄件人竟然是10年后的自己，10年后的菜穗声称自己的生命中发生了无法挽回的巨大遗憾，为了弥补这个遗憾所以才寄出了这封穿越了时空的信件。
刚开始，菜穗只是将这封信当成是一个恶作剧，但第二天，信中所提及的那个叫做成濑翔（山下诚一郎 配音）的男生竟然真的转学到了菜穗的班上，按照信里所说，菜穗将会喜欢上翔，而翔则会在17岁那年的冬天死于非命。菜穗该怎样做才能够避免这一悲剧的发生呢？