In their senior year of high school, Chen Mo covered the entire campus with anonymous love letters. Every page said, “After I die, please take care of her for me.” Su Niannian read the whole wall through tears, then turned to everyone and said, “This is my suicide letter. I have cancer.” One misunderstood love letter tore open the secrets and fears two teenagers had kept buried deep inside. While the whole class thought it was a prank, only her best friend Lin Xiao knew the truth. Student council president Zhou Yi was consumed by guilt as he investigated, while their homeroom teacher, Mr. Zhang, and the school nurse, Ms. Wang, each used the scars of their own pasts to protect a secret on the verge of falling apart. At the boundary between life and death, and youth, Chen Mo learned to stop running away, while Su Niannian learned she didn’t have to bear everything alone.