Mysterious giant beings called Dragon Tails appear across the world. Due to the danger they could bring, the Keroro Platoon does a worldwide research on the Dragon Tails, but Tamama suddenly disappears during the research. Because of this, Keroro, Natsumi and Fuyuki start their search for Tamama and go to France, where they meet a mysterious girl named Shion who holds the mysterious Dragon Book. But little they know about the secrets about her and the worldwide calamity that would destroy the entire world as they know it.

Source: ANN

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Parent story: Keroro Gunsou