Sound therapist Lin Wanqing opens a "sound wave studio" in a corner of the city, using gentle sound waves to help people relieve anxiety. Workaholic Lu Chenfeng is brought in for an experience by colleague Zhou Minglang due to severe insomnia. At first, he resists all "unscientific" therapies, but gradually lowers his guard in the company of Lin Wanqing's voice. Together they help Chen Siyuan, who is afraid of public speaking, and Su Yunru, who is overloaded with pressure, and also let the neighbors of the entire apartment building learn to listen to each other. No magic, only sincere healing echoes between people.