Other Title: 仮面ライダービルド-証言はゼロになる, Kamen Raidā Birudo-Shōgen Wa Zero ni naru
Summary: Sento was suddenly poisoned by someone with a cobra marking on his
chest! The poison has caused Sento to remember another human
experimentation memory. Sento remembers one side panel of the Pandora
Box within the human experimentation site. A wounded Sento realizes that
the Pandora Box will lead them to the secret organization, Faust. He
asks Misora to gather information on the Sky Wall. Meanwhile, Ryuga
arrives in Seito to protect Nabeshima's family, which could serve as a
clue to solve his false murder charges. Faust suddenly appears before
Ryuga who desperately attempts to protect Nabeshima's family..