Ken move to US with his mom when he was still a child while his father remained in Tokyo acting as Ultraman. There, Ultraman’s son pursued his dream of becoming a professional baseball player. Still, Ken inherited his father’s abilities, and when his father could no longer be UltramanKen abandoning his life in America and returning to Japan, where he has to live up to his father’s Ultraman legacy. Ken Sato in his journey of honoring the Ultraman mantle while protecting a baby kaiju from the KDF.