The apocalypse descends, and humanity is thrown into underground dungeons to survive. Su Lingyue receives a mission to tame her monster boyfriend—the 2D paper husband she abandoned in her game. Once restrained and noble, the Lord of Brilliance, Helius, degenerates for her into the paranoid Lord of Shadows, reversing time ten million times just to keep her by his side. Fleeing, maneuvering, losing her memories, and reincarnating, she seeks to reclaim herself amidst the system's conspiracy. When the deity asks tens of millions of times if she will love him, she finally answers: I love you. He completes the world for her, and she waits for him to cross dimensions to find her.