Yoon Jae-geun

Unable to remember anything about his life, a man begins regaining consciousness in a new body every 12 hours. Now, he must piece together his identity, all while evading attacks from pursuing agents and dangerous criminals alike.

Kwon Yeon-woo is a thirty year old low-level civil servant who works in a district office; quite innocent for his age, he has been on numerous blind dates in an unsuccessful bid to find a wife. After moving into a new place, he begins to encounter a high school girl, Soo-yeong, on his way to work every morning, and she begins to develop feelings for him. Meanwhile, Kang Sook has just started working at the district office straight out of high school, and falls head over heels for older woman Kwon Ha-kyeong.

One middle aged women is admitted to the hospital in a coma. Yeon-hee, who has been searching for a heart to transplant to her daughter, who has critical heart disease, is begging middle aged women's gangster son, Whee-do, by giving him a fortune. But when the reasons for Whee-do's mom are revealed one by one, Yeon-hee, who became desperate, is teaming up with dangerous people.

A struggling musician takes a job teaching music to middle school children in a rural mining town.

A skilled detective, Yeong-jun, goes to Busan to investigate a murder case. He needs to cooperate with his father, Min-ho, who is a veteran detective, but they have a bad relationship to fix.