In a world where Tetsujin 28-gou battles against time, a new protector faces a moral dilemma that threatens to unravel the fabric of time itself....

In a world where Tokyo is under siege by demons, Tetsujin 28-gou, the Iron Guardian, must confront the curse that binds him as he descends into the abyss of his own creation, risking everything to save the city from eternal darkness....