Chen Luo, a second-year middle school boy, unlocks Liu Yue, his classmate who is a transfer student, during his senior year of high school.
At first, he only thought Liu Yue was an ordinary academic, but as he gradually got to know her, Chen Luo discovered that this seemingly sunny and enthusiastic young man around him had many secrets.
The classmates who went abroad because of him, the confusing life experience, the love letter of the unknown master...
Countless things happened to Chen Luo after Liu Yue appeared.
As they gradually trust and the secrets are gradually revealed, the two get closer and closer, but misunderstandings and the truth will always make them go further.
Liu Yue: "As long as you believe in me, I will never let you down."
Chen Luo: "I believe you every time, but you always disappoint me."
The consequences of some mistakes will always remind him that the outcome can never be changed, but for Chen Luo, he is willing to give it a try.
Purpose: Those who make mistakes and fall into the abyss need a brave young man to save them, and those who betray their sincerity will never recover.