Some melodies can only be heard by certain people. Some feelings only surface in the sound of rain.
Zhou Xiaonan is a top student at a prestigious high school. Her life follows a predictable routine, until the first day of her second year, when she meets Gu Xingchen, a transfer student, in a rainy alley. He is a flippant boy with a hidden gift for the piano.
He is the school's notorious "problem student," yet plays his own melancholy compositions when no one's around. She is the perfect class monitor in her teachers' eyes, yet writes about an unknown rebellious streak in her diary. When their homeroom teacher forces them to work together on a school magazine column, a collision of youth, dreams, and growing up quietly begins.
Gu Xingchen is burdened by his mother's serious illness and his father's expectations, and is forced to give up his dream of music. Zhou Xiaonan is trapped by her parents' plans and has never thought about what she truly wants. It isn't until a torrential downpour traps them in the school's music room that they discover, as the piano notes of Silent Confession meet the words she has written, that the most moving sounds often come from the truest hearts.
But when Gu Xingchen secretly signs up for a piano competition, and Zhou Xiaonan is forced to choose between her parents' expectations and her own desires, the rainy alley where they first met becomes a fog of growing pains they must face together...
