Hwang Tae Hee is the daughter of a chaebol and team leader at her workplace. When Bong Joon Soo and Baek Yeo Jin both begin to work in her team, they become her love interest and troublesome rival respectively. Tae Hee has to juggle her challenges in love with those in work, helping shape her boss and department director, Goo Yong Shik, from an insensitive and uninterested second generation chaebol to a true leader. Tae Hee's seeming success in love, however, presents her with another problem as she begins to realize that marriage involves just as many obstacles to overcome.

Revolves around penniless Ha-ryu who is driven by upward mobility and a thirst for personal success. Here is a man who can do whatever it takes to make money. He dreams of raking in 10 billion won by selling cars. Due to this wild idea, he is deemed crazy by everyone, but is ready to sell even his soul to become a billionaire. “I will make myself fully prepared to take every chance that lies ahead of me!!!”

Cho In is a very gifted doctor who has everything that he wants whereas his older brother, Seon Woo, is jealous of all the attention that Cho In receives. Seon Woo blames his brother for taking everything good in his life away from him. Seon Woo blames Cho In for getting their father's love, getting more recognition as a doctor, and for stealing the woman he loves.

The life of Go Eun Chan (Yoon Eun Hye) is not easy; she works many jobs to pay off debts and even gave up her feminine image. Choi Han Kyul (Gong Yoo) is the heir of a big food company, but his grandmother wants him to settle down, so she arranged many dates for him. After Eun Chan bumped into Han Kyul and was mistaken for a boy, Han Kyul decided to hire Eun Chan to be his gay lover in order to avoid the arranged dates. Desperately in need of money, Eun Chan had no choice but to accept. Han Kyul's grandmother also made Han Kyul in charge of a filthy coffee shop in danger of being bankrupt. Eun Chan begged to work at the coffee shop, and not long after, feelings start to spark, except, how would Han Kyul accept his "homosexuality"?

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Yoo Sun (Yoon Son Ha) is an aspiring chef with a rare disease that will eventually make her blind. To make matters worse, she does not get along with her boss, Kim Tae Bin (Kim Sang Kyung). Ironically, the two of them eventually fall in love!

As Sun and Tae Bin enter a relationship, a dramatic love triangle unfolds: Tae Bin’s best friend Suh In Ha (Park Yong Ha) has a crush on Sun, while In Ha’s sister, Suh Ji Ho (Chae Jung Ahn), has a crush on Tae Bin! When Tae Bin learns of Sun’s disease their relationship begins to deteriorate. Tae Bin has difficulty accepting Sun’s condition, while Sun has difficulty accepting Tae Bin’s pity. Will Sun and Tae Bin be able to work things out? Or will In Ha and Ji Ho be able to step out of the love triangle victorious?

A young man here is dreaming his future. He needs to do whatever task lying in front of him as to earn his living, yet he is running fast to dream and to love. Whenever he is sprinting, he is so full of energy that he forgets about his poverty and his dark family background. The world might jeer at him but he does not care.

She is rather special. She is very well aware of her charms and is highly self defiant. The most unfamiliar word to her is "failure" because she has never faced failure in her life since the world was always on her side. She conquered whatever she intended and she dumped whatever she thought unnecessary. However, she just cannot deny the love that is to determine her destiny. She is like an open hearted prairie, young and gleaming.

They love each other and the love changes both of their lives; they run towards the uneasy future.