Kim Hae-kyung is a skilled food psychiatrist who analyzes his patients' emotional traumas through the food they eat and their dining habits. Woo Do-hee is an eccentric producing director (PD) at a digital content company who has become cynical and deeply disillusioned with romance after enduring devastating breakups. When the two cross paths coincidentally on Jeju Island amidst separate moments of heartbreak, they find an unexpected source of comfort in sharing a meal without exchanging names or personal backgrounds. Upon returning to Seoul, fate continually throws them together, leading to a unique arrangement: becoming 'dinner mates.' Under strict rules to only meet for meals and keep their identities, careers, and personal lives secret, they discover that dining together allows them to drop their guards and heal psychological scars they couldn't share with anyone else. Their meals become a safe harbor from the chaotic demands of modern life and past emotional wounds. However, their unattached dynamic is tested when their respective past lovers re-enter the picture. Hae-kyung's first love, fitness trainer Jin No-eul, seeks reconciliation, while Do-hee's former college sweetheart, medical journalist Jung Jae-hyuk, reappears with obsessive intentions. As old wounds reopen and the anonymity between Hae-kyung and Do-hee inevitably dissolves, the two must decide whether to retreat back into self-protection or risk opening their hearts to true love once again.