Decades have passed since Shotaro Kaneda and the original Tetsujin 28 safeguarded the world, yet evil continues to threaten humanity. Now a new hero and a new robot, Tetsujin 28 FX, must take up the mantle. Masato Kaneda, who vanished mysteriously a year earlier, returns to protect Earth alongside his family and friends against the diabolical Neo Black Gang. Masato’s brilliant mother, Yoko, provides upgrades for Tetsujin 28 FX, and both Shotaro and the original Tetsujin 28 occasionally step in to help. Together, they confront the Neo Black Gang, other villains, and rogue robots to defend the planet.