Mok Sol-hee, "Liar Hunter", has a special ability to distinguish between truth and lies. She runs a secretive tarot café where she receives requests from VIPs who need her ability. One day, top composer Kim Do-ha, hiding from a dating scandal, moves into her neighborhood. When he's nearly exposed, Sol-hee helps him—but Do-ha, recognizing her from five years ago, fears she’ll uncover his identity.