When a woman happens to be caught in a trap, a man rescues her and takes her to his flat.

The story takes place in Seoul, 2011. Lee Yoon-sung is a talented MIT-graduate who's working on the international communications team at the Blue House. He encounters dangerous situations while solving a variety of cases, both big and small, for people who need his help, and eventually becomes a "city hunter."

Ma Hye Ri is a woman with an excellent memory and ability to focus, which allowed her to pass the bar exam with ease. Despite her talents, she is more interested in being fashionable and dislikes hard work, so she is far from being an ideal prosecutor and has doubts about her suitability for her job. Through her conflicts with senior colleagues and struggles with difficult cases, however, Hye Ri gradually matures into a brilliant prosecutor with a sense of duty and justice.

Hyun Ji-seok, a university professor, and Go Mi-yeon, a scriptwriter, were high school sweethearts, who discover that they are cousins. They break up, but find themselves attracted to one other once again when they meet in Seoul four years later.

Julian has lived off the money he lures from his rich female customers. But now he faces usurious debts from a hasty expansion of his business, and he will be killed unless he clears the debt in one month. The only way to save himself is to pretend to be the long-lost brother of an heiress and kill her to get her huge fortune. Min, the blind heiress, cold-hearted like Julian, slowly opens herself to him, and he, too, falls for her. But Julian has to pay his creditor and what makes it worse for him is that the illness that took Min’s eyesight relapsed, threatening her life.

When she was 5 years old, Seo Hee's mother ran off with one of their servants and she was left with her father, who had never been kind to her.

After much trials and tribulations, a man marries his first love. But when she gets pregnant, they find out that she has cancer.