Zhou Shen Shen loses her voice after a bus accident and gets taken to the hospital by her friend, Zuo Jun, who blames himself for making her mute. There she meets Qi Wei Yi, a boy whose leg got broken by jealous peers. He finds a letter she had put in a bomb shelter wall. They leave each other letters and promise to come back in the Christmas of 2006. They become good friends and fall in love, but Wei Yi is unaware that Shen Shen is mute. When he has to leave before her, he gives her his phone number and tells her to call him. Years pass and in the year of 2006 ,they met again but is unaware of who each other is until Wei Yi finds out he has liver cancer and is dying. So he decides to go back to the hospital he went to as a child and he finds out that Shen Shen is his childhood love but not wanting to hurt her when he dies, he hides his identity and eventually pushes her away.