Li Gang (name), an introverted boy from a small northern town, grew up in a single-parent family and was at odds with his unruly mother. When he was seven years old, he discovered that he was different from ordinary people. Whenever he heard someone lying, he would have tinnitus. Because he can detect lies, he appears dull and indifferent to many things. Until one day when he was seventeen, he met Qi Fei, a girl who had just moved to town...