擁有識破謊言能力的陸芊雨，卻一直受盡此能力困擾，無法相信別人，後來發現可把這能力變成賺錢工具，替人辯識謊言解困，成為謊言捕手。自遇上天才作曲家文祖和後，卻從未聽到他說過一句謊言，一度懷疑自己的能力失效。芊雨不斷找方法接近祖和以測試自己的能力，過程中卻發現祖和不止是五年前她曾意外幫助過的陌生男生，更是一宗少女失蹤謀殺案的嫌疑犯。祖和因被懷疑謀殺案受盡唾罵，多年來，一直隱姓埋名，更從不露面過著隱居生活，唯遇上芊雨後，芊雨不但成為唯一相信他的人，更協助他尋找真相。過程中，二人慢慢靠近，發展出超凡情誼，更互相解開心結，芊雨逐漸開始對人產生信心，而祖和也再次投入正常生活。

Being able to discern lies, Luk Chin-yu has been troubled by her power and unable to trust people, but then she realizes she can use her power to make money by becoming a lie catcher who helps others solve their problems through identifying lies. Since she met Man Cho-wo, a genius composer, she has never heard a single lie from him and she suspects that her power is failing. Chin-yu keeps approaching Cho-wo in different ways to test her power. In the process, she finds that he was the stranger who helped her 5 years prior, as well as the suspect in a missing and murdered case of a girl. Cho-wo has been hiding in anonymity for years because of the public's despise stemming from his suspected involvement in the murder case. But after his encounter with Chin-yu, she not only becomes the only person who believes him, but she also helps him uncover the truth. The two, who have since then got closer, develop unexpected affection towards each other and help each other find closure, with Chin-yu rebuilding her trust in people, and Cho-wo trying to live a normal life again.