Shen Ye, judged to be tier zero, actually has the nine-segment dragon bone sealed inside his body! In a underground city where ancient martial arts and machinery coexist, noble families control energy, and even the prosthetic limbs and breathing of ordinary people can be cut off by a single order. As the dragon bone seal gradually unravels, Shen Ye and the maintenance girl A Man fight side by side. From saving the person before his eyes to investigating his own lost past, he discovers that his power, memories, and identity all hide secrets buried by others. Powerful enemies press closer step by step, and the dragon bone awakens successively. Every breakthrough brings him closer to the truth, and also makes him pay a greater price. This time, he will personally break the shackles controlling his fate!