After discovering that she lives in a book of destiny, Yun Manman tries to escape her gruesome fate by falsely claiming an anonymous love letter and approaching Shen Cangfeng, a promising disciple. She regularly brings him spiritual delicacies and accompanies him through arduous cultivation. Initially, she only hopes to seize opportunities and change her destiny, but feelings gradually blossom between them. Shen Cangfeng has long realized that she did not write the letter, yet he silently allows her to stay by his side. When Su Ying reveals the truth about who wrote the letter years ago, they discover it was merely written on a whim. The three finally resolve years of emotional entanglements, and the protagonists break free from the constraints of their predetermined story to walk the path of immortal cultivation together.