In the seventh era after the gene storm swept across, immortality was no longer a legend, but a forbidden entity known as the "Medicine of Essence". Xuan Ning, a half-human, half-plant mutant, has the ability to sense the roots of life, but was expelled from the human settlement and exiled among the mutated jungles and ruins. He desires the elixir of immortality, not for immortality, but for the purpose of restoring his mother's body and ending the pain of species fission. Xuan Ning's journey is a resonance with creatures from other worlds, and it is also a questioning of the nature of oneself - when the genes of all things are intertwined, does immortality mean ultimate loneliness? In an alienated world, Xuanning must choose: pursue medicine to resolve fission, or embrace new life and reshape the order of species. The novel uses poetic mutated landscapes, unique biological interactions, and profound human struggles to reveal the true price behind immortality.
