Soo Hyun, a famous psychologist from the U.S., returns to Korea and opens a psychotherapy clinic—only to lose clients to Hye Rim, a fortune-teller known for her uncanny ability to read people. Frustrated and curious, Soo Hyun devises a psychological experiment to win her over and prove a point: he sets out to make her fall in love with three different men, including himself.

As Hye Rim, once skeptical of love, finds herself swept up in this unexpected romance, her beliefs begin to shift. But when she learns she’s been part of an experiment all along, will her feelings for Soo Hyun survive the truth?