Yuri Honjö appears on the roof of a building. Frantic, she calls her brother, Rika, who explains the "world" they are in. Masked figures run amok, despairing people to commit suicide by jumping of roofs, which Yuri witnesses. A Mask then attacks her. As she reaches an adjacent roof, a police officer shoots the Mask. Another officer, Mizushita, assesses the scene, but then pushes the first officer off the roof. Mizushita attempts to sexually assault Yuri when a masked man with a sniper shoots Mizushita. Yuri burns Mizushita's body and takes his gun...