Su Jiaojiao's soul is bound to System 007. She travels through three thousand worlds, completing various missions to earn points, with the goal of returning to her original world. But her memories have been sealed by someone, and that someone is herself. The reason is unknown.
Fu Rongshen is a being of cosmic proportions. His true form is the most wanted fugitive ever pursued by the Space-Time Administration. He tears through the barriers between time and space, projecting fragments of his true soul into every world to hunt down Su Jiaojiao. He has a different identity in each world, but his core consciousness never changes: find her, make her remember him, and make her willingly return.
System 007 appears to be an ordinary AI for a quick transmigration system. In truth, it is a fragment of Su Jiaojiao's own soul, which she left behind to guide herself toward awakening when the seal weakened. It knows the truth, but its programming has locked it down, allowing it to reveal specific information only under specific conditions.