Kim Ji-ho is a broken hearted man who winds up in Jeju Island for a work project but he keeps running into a girl. Both of them get robbed and have to sleep in the same guest house. They depend on each other for a day as his wallet and her phone got stolen. As they stay in Jeju Island, she heals his broken heart and they fall in love.

A hotel concierge and a psychiatrist with traumatic childhoods form a heartfelt bond when they become entangled in a perplexing local murder case.