A new menace emerges from Bardos Island in the Aegean Sea: Doctor Hell and his army of mechanical beasts threaten humanity. In response, the indestructible metal chogokin giant robot Mazinger Z is assembled, armed with advanced weaponry, and piloted by the hot‑headed teenager Kouji Kabuto. Determined to avenge his grandfather’s death and defend Japan, Kouji uses Mazinger Z to confront Doctor Hell’s forces.