When 21 year-old Clary Gibbs decided that she wanted to live a new life as a fully licensed Beautician, she chose Korea as her destination, being that Korea is well-known for their Beauty concept. But there were three things that got in her way of owning a citizenship in Korea. She was single, jobless and because she is legal of age. After months of proving to the immigration department that she is worthy of staying in Korea, which involves intensive Korean language lessons and sleepless night, she finally got the Immigration Department to agree on a visa. Another obstacle occur, she may only get a green-card from Korea if she have a secure and a steady job or she gets married with a Korean local and she is given only 30 Days. 

She was do determined about her plans when she arrived to Korea, until she met the tall and playful 22 year-old Park Chanyeol who turned her life into a roller coaster ride. 

What will she gain for the next 30 Days career, love or both??