Wu Xie, living a quiet life after years away from tomb raiding, is pulled back into the hidden world of the Eleven Warehouses when he receives a mysterious message from his missing third uncle. Struggling with a serious lung illness, he sets out to investigate the clues, joined by his steadfast companions Wang Pangzi and Zhang Qiling. Their search leads them to Thunder City, a place connected to a strange incident involving Warehouse 11 and rumors of a hidden tomb. Along the way, they encounter Bai Haotian, a dedicated officer of the Warehouse 11 who becomes involved in their mission. As the group explores dangerous ruins, underwater villages, and secret chambers, they begin to piece together the events leading up to the disappearance and uncover links to a powerful relic known as the Thunder Seal.