Su Jin transmigrates to the world of Honkai: Star Rail and binds himself to the Path Echoes System. By drawing cards, he enters the “what if” worlds of tragic counterparts, carrying out solemn acts of redemption in seemingly absurd ways. He travels through Herta Space Station, Belobog, Xianzhou Luofu, Amphoreus, and other worlds, mending regrets and easing the corruption of Stellarons, while also bearing the pain and curses of his counterparts. As the echoes of his repairs accumulate, he gradually uncovers the deep ties between the System and the Imaginary Tree, the Stellaron crisis, and even the Path of Finality. Meanwhile, the accumulated “marks of trauma” bring him to the brink of collapse.