While on an outing to an amusement park with his family to celebrate his daughter’s middle school graduation, Shingo Asahina encounters a mysterious man covered in blood being pursued by some unsavory characters. On the spur of the moment, he gets on the Ferris wheel with the wounded man to shelter him. When questioned, the man simply says “In 30 minutes, this amusement park will turn into hell on Earth,” and explains that in order to prevent disaster, he needs to “borrow” Shingo’s body…