In the "relics of the old world" shrouded in the "fog of oblivion", a hundred-year war broke out between humans, the machine race, and the spirit plant race over the "core energy", which ended with the three parties signing a "silent contract" and sealing up the energy core. A hundred years later, A-Ling, a young scavenger at the edge of the fog, picked up a talking rusty iron gear "Old Tooth" in a pile of abandoned machinery. He accidentally triggered the sleeping energy fragments and awakened the sealed "Shadow of Resentment" - a monster condensed by the hatred that had not dissipated in the war. In order to prevent the ruins from falling into destruction again, A Ling took Lao Chi on a journey, and met Qing He, a girl with a spiritual plant who carries the secrets of the tribe, and Yin Shuo, a general of the mechanical tribe who was falsely accused of treason. The three formed a temporary alliance and traveled through the "Whispering Forest", "Gear Desert", "Floating Ruins" and other areas full of fantasy and crisis, looking for scattered energy fragments to re-seal the Shadow of Resentment. During the journey, they not only have to fight against the pursuit of shadow beasts and the covetousness of all forces, but also face their own inner trauma: A Ling has to accept the truth that he is a "war orphan", Qing He has to break the Lingzhi tribe's ancestral precept of "not having contact with foreign races", and Yin Shuo has to clear his grievances and rebuild the trust of the mechanical tribe. In the end, the three of them understood that "peace is never about sealing hatred, but about learning to coexist with pain." They used "understanding" rather than "power" to complete the redemption of the legacy, and also presented a fantasy adventure about growth, forgiveness and hope to adult readers.
