Zhou Wan, a violin girl with perfect pitch who has grown taciturn after family troubles, accidentally discovers the secret of Shen Ci, the campus piano prince, who can no longer play because of trauma-induced deafness. Their souls, both trapped by music, draw closer amid lies and truth, noise and silence. In their own way, they learn to "hear" each other's heartbeat, find the courage to return to the stage together, and compose a melody about youth, healing, and love.