The story follows the pain and growth of 17-year-old Min Jae and Seo Yeon. Min Jae is an ordinary, male high school student. He doesn't talk much and he has a bit of a sensitive personality...

Cho Yeo Hwa has been a widow for 15 years. Her in-laws are the most prestigious noble family in the kingdom. During the day, she leads the life of a widow devoted entirely to her dead husband's memory and rarely ventures outside the gate of her home. At night, Yeo Hwa dons the mask of Hero, who secretly jumps over the surrounding wall to save the helpless.

A man and woman shaped by loss and time separate in youth, then reunite ten years later to find their once-shared bond still guides them through love, grief, and adulthood.

Making use of her Chinese that she learned while living in China, Han-young obtains her tour guide-interpreter's license and starts working as a guide in Korea. She gains good results at work, but she is forced to face challenges.

A year from their breakup, Woong, who successfully got a job, met Min Chae again. They didn’t save much, but here starts their sweet challenge to marriage.

Office politics take center stage for marketer Park Yoon Jo, whose lack of an academic background won't deter her dedication to her work, and the smart and just Ryu Jae Min, who lacks any expectations towards their company.