Laura (Lana Condor) is a 16-year-old girl. No matter in appearance or character, Laura can only be regarded as the most ordinary one. Throw her in the crowd, and you will never notice her again in the next second. However, Laura's delicate mind and rich emotions make it easy for her to have a good impression on boys, but she always hides this admiration in her heart, just by writing letters to express her emotions. Over time, Laura has accumulated a lot of love letters, which she hides and decides to keep as her eternal secret. What Laura didn't expect was that all her private letters were made public one day. The huge response brought by the letter soon changed her life drastically. Facing the voices of all parties, whether it was ridicule or kindness, the brave Laura faced it with a normal heart.