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.
传奇海盗Gol D.Roger在去世前留下了关于他一生财富“海贼王”的消息,这导致了众多海盗的崛起,他们争夺这一传奇的巨额财富。各种力量和政权不断交替,整个世界进入了动荡和混乱“海盗时代。