This movie starts with Saze X playing basketball. Suddenly, a lightning bolt hit the earth. They walked towards it and found a boy. The boy's name is Ricky, and he thinks he has forgotten everything. On the other hand, Remy told Sazer-X that a giant monster named Mechanical Giant Bulgario had approached Earth and was destroying buildings. Sazer X still defeated the monster. But then something flashed into their eyes, and Takuto mistook it for a cosmic capsule. In fact, this is the Bosquito people that exist within Bulgaria, which Professor Horiguchi later explained.
井西佳(由北野武饰演)是一名警察。他的女儿几年前不幸去世,现在他的妻子(岸本志子饰演)患有晚期白血病。他被好心地邀请去看望妻子的伴侣Horiba(Osamu Ryo饰演),但在执行任务时受了重伤,导致下半身瘫痪,并由轮椅陪同。