In the near future, technology has made a few leaps and bounds, and videophones and constant wireless internet access are available to everyone. However, it would seen that the government has been careless and a skilled hacker was able to break into the national information archive. Using the data held there he creates the Platonic Chain website for people to discover information about themselves and their friends. Words start to spread quickly that there is a site that enables you to look up anything. Coincidentally, three young girls, Hitomi, Rika, and Kanae, are able to access the site.

After a daring escape from the Memory Museum, Sayaka Miki returns to Mitakihara City with unsettling news. Troubled by what she has learned, Sayaka reveals to Madoka Kaname and Homura Akemi the whereabouts of Mami Tomoe—but more importantly—the disturbing truth behind the existence of magical girls. Despite knowing the cruel fate that awaits them, the three quickly resolve to work together and save Mami once and for all. Meanwhile in Kamihama City, Yachiyo Nanami hunts various "rumors" in search of Hotel Fendt Hope, the headquarters for the Wings of Magius. The magical girl organization is Yachiyo's only lead in finding Iroha Tamaki, whose disappearance remains shrouded in uncertainty. Determined to reunite Team Mikazuki Villa, Yachiyo swears to destroy the Wings of Magius and put a stop to their insidious plans. Amidst the turbulent situations, a calamitous threat approaches, presenting a dire conflict set to jeopardize the entire world.

Based on the Ninja Awate-maru comedy manga by Jirou Tsunoda.

Zundamaru is back... For now! Even without missions, we elite ninjas face grave dangers every day!