The suicide note begins with Nanyu jumping off a building and dying in front of Shi Nan. Returning to their high school days, the two have no memory of their previous lives and still love each other. At university, one is studying medicine and the other is studying police. After graduation, he became a doctor and an anti-drug policeman. When Nanyu was 27 years old, he was discovered to be an undercover agent. He shot and died with the drug dealer. Shi Nan only found out that his lover was dead when he got Nanyu's relics. He wandered on the verge of committing suicide for a while. His high school friends accompanied him. After he walked out, he would still cry and talk in front of Nanyu's remains.
Concept: Love that transcends the secular world, pure love