Following an end-of-term school ceremony, the American boy Bobby decides to go with his friend Akkun into the mountains outside their village, to a place perfect for a secret base. On the way they stop into a mysterious amusement park. They have fun there, but are attacked and cannot leave. Falling in with some other children who are also lost there, they fend off a number of attacks, and gradually learn the truth behind the facility.
悠木碧
as Bobby
田中直樹
as George
高橋茂雄
as Akkun / Yakkun
小野大輔
as Takaaki
藤田咲
as Yoshiko / Sayaka
田口トモロヲ
as Koike
松本人志
as Narrator
