One summer day, two ex-lovers run into each other. This chance encounter is connected to three other summer days across the past ten years.

When Huh Saek decides to become a male gisaeng, he captivates countless women with his looks and talents but doubts the existence of true love — until he meets a girl with progressive ideas.

Hae-Soo moved to a small city where nobody knows her. There, she opens a cafe and starts a new life. One day, a customer and a high school student, Ye-Jin, gives her a hand during the cafe's busy hour. Hae-Soo then hires Ye-Jin to work as a part-timer at her cafe. They form a close bond while secrets and confused emotions linger in the background.

Making use of her Chinese that she had picked up while living in China, Han-young obtains her tour guide-interpreter's license and starts working as a guide in Korea. She gets used to her new surroundings and gains good results at work. However, she is forced to face challenges and changes as she loses touch with her brother In-hyuk, and the number of Chinese tourists decreases due to political tension between Korean and China.

Joon-hee, a fourth-year assistant manager at Hanyang Heavy Industries gets assigned to the human resources department. As the shipyard suffers a dearth of orders, the creditors instruct the HR to restructure the company. Although reluctant to do so, the team supposes that it is inevitable for keeping the company afloat. The HR proceeds to make the restructuring as smooth and efficient as possible. In an attempt to set the criteria for dismissal in company’s favor, the team first tries to elect employee's representatives who will cater for the demands of management. Some of the so-called blacklisted employees who are well aware of the conventional procedure start to put on a brake…