사랑을 거부한 남자와 현실에 부딪혀 사랑을 포기한 여자의 이야기. 훈남은 재벌 회장의 혼외 자식이지만 친모가 세상을 떠나면서 공식적으로 후계자가 된다. 그는 사랑을 믿지 않고, 언제나 다른 사람에게 감정이 생기지 않을 만큼 거리를 둔다. 한편 정음은 일상에서든 사랑에서든 자신의 모든 것을 다 내주는 타입이다. 다른 사람을 사랑하는 사람이 가장 행복하다고 믿지만, 그래서 첫사랑에 실패한 아픔도 있다. 두 사람은 주위의 싱글들이 사랑에 빠질 수 있도록 도와주면서 서로에게 빠져든다.
The Undateables is about a man, Hoon Nam, who refuses to love and a woman, Jeong Eum, who dreams of being passionately in love but gives up on the idea due to the reality of things. These two offer to help those who are single to fall in love, but in the midst of all this, they fall in love with each other. Hoon Nam officially becomes the second son of DMJ Foods when his biological mother, who gave birth to him out of wedlock, passes away. Due to this, he has never believed in love and has the ability to distance himself just enough so that he won't be affected emotionally by others. On the other hand, Jeong Eum is the type who gives her all whether it be in her everyday life or in love. She believes that whoever loves the other the most is the happiest, and this is why her first love only left her with scars. Tune in to watch how these two seemingly helpless and foolish people fall in love!