Lin Zhiyao fell into self-doubt after a failed psychological treatment. He accidentally heard that the "Wilderness Post Office" could send letters to the past, so he embarked on the road of search.
She, Bai Zhi and Qin Ce came to the post office together and wrote their respective letters under the guidance of the mysterious postman Shen Jin.
After the letter was sent, reality began to change subtly. The three gradually discovered that the past could really be rewritten, but the price was far heavier than imagined.
And Shen Jin's true identity seems to be inseparable from the post office...
