A century after the revival of spiritual energy, a new era dawns on Earth. Humans develop spiritual energy professions, absorbing the revived energy. Simultaneously, the planet's flora and fauna evolve, becoming more primal and spiritually mutated. Lin Yuan discovers he can infinitely evolve spirit beasts, purifying their bloodlines. He starts a thriving online shop specializing in spirit beast evolution. This is a story about Lin Yuan and his spirit beasts.