The transmigrator Yang Cheng dies on a rainy night at the port, his consciousness continuing in the avatar of the eighteen-year-old girl Aignes. To survive, she enters the Church of Saint Martha, gradually mastering the powers of light and shadow amidst the "Thousand-Faced Split Appearance" and talented growth. After leaving the church, she embarks on an adventure journey with Xiwa and Alakeni, becoming entangled in secret realms, royal vessels, and the crisis of Greenery City. Facing Laixiusi, who manipulates the battle situation with threads and blue butterflies, she pursues the price of power through repeated losses and choices, protecting her companions and striving for the freedom to determine her own destiny.