Min-woo comes back from his studies in Italy, but is still grieving over his first love. Jun-ah, Jung-jae's sister, is in love with Min-woo, whow as her senior in Italy. She comes back from her studies as well, to track Min-woo down.
Hye-won sprains her ankle while hiking in the hills. She meets Min-woo who was hiking, and both spend a night in the hills where Min-woo takes care of Hye-won. During the chanced encounter, Min-woo finds many similarities between Hye-won and his deceased girlfriend, and is immediately attracted to her. Hye-won in turn notices that her heart beats in an uncontrollable maner when Min-woo is around, and is puzzled by the response. As Min-woo thinks Hye-won is married, they part ways without exchanging eaxh other's names and contact details.
As fate would have it, Min-woo and Hye-won have another chance meeting at the hometown (tea garden) of Un-hae. They spend an unforgettable day at the tea garden both feeling a connection. But they do not manage to exchange any information again this time. But as destiny has charted out for them, Min-woo and Hye-won will meet again because of the Kara Holiday Resort project.
Jung-jae's hotel chain buys over a Holiday Resort and is planning to have it renovated. Min-woo's proposal (who is an Artistic Director for such projects) is accepted as the winning bid.
When Min-woo and Hye-won meet for the third time, both are formally introduced, and find out that they will be working on the project together. Min-woo also finds out that Hye-won is not married but engaged to Jung-jae. Min woo sees his first love's shadow in Hye-won, and believes that Hye-won is the second person to let him love again. And with the commencement of the Holiday Resort project, the love lives of the 4 leads start to get complicated.
As both interact more during the project, Jung-jae notices the mutual attraction, and pushes for Hye-won to have their engagement ceremony. On the day of the engagement, Hye-won faints, and is admitted to the hospital. While she is hospitalized, Hye-won has a dream. She dreams that someone gave her encouragement, and a hand to lead her out of her coma. When she awakes, she thinks the person is Jung-jae. But later, when Hye-won eventually finds out that the person giving her those encouragements is Min-woo, she realizes that she is also in love with him.
Against all odds, Min-woo and Hye-won end up together. However, a sboth Jung-jae and Jung-ah refuse to give up easily, their union becomes strained with the guilt and emotional baggage of their previous relationships.
When it is eventually reveald that Un-hae's heart is beating in Hye-won, it creates a further rift in their fragile relationship as both are confused whether their inexplicable attraction is due to this common link that they share, Un-hae's heart. Min-woo is overcome with guilt treatment of hye-won as Un-hae's replacement. Hye-won is also unsure of her feelings for Min-woo, and as she does not wish to constantly remind Min-woo of Un-hae with her presence, Hye-won decides to break up with Min-woo.