Meet Mok Sol-hee, a woman with an extraordinary ability to hear lies. Running a counseling center disguised as a tarot cafe, she is also a Liar Hunter for VIP customers. At first, she thought her ability was special, but facing endless lies made her see it as a curse. Then, a mysterious masked man, Kim Do-ha, a genius songwriter, moves in next door. Sol-hee decides to seek the truth with Do-ha, who had been released without charge after being involved in a homicide case five years ago.