Semua orang akan berjuang apapun demi masa depan mereka dan memiliki kehidupan yang layak, mungkin begitu gambarannya dari para pemain “Level” Up ini yang berjuang demi perusahaan pengembangan game online.
Ahn Dan Te (Sung Hoon), seorang pria yang ahli Restrukturisasi yang memiliki kepribadian yang sangat Perfeksionis dan dingin dikirim dari perusahaan game pusat untuk menyelematkan perusahaan tersebut
Dan dirinya dipertemukan dengan Shin Yun Hwa (Han Bo Reum), yakni kepala dari pengembangan game perusahaan yang hampir bangkrut. Ia sangat menyukai game. Namun, disinilah awal cerita mereka.
Cellphone app Joalarm is created. If someone likes you and they are within 10 meters of you, the alarm for the app rings. The app also shows how many people like you, but the app doesn't reveal specific details on who likes you.
Kim Jo-Jo (Kim So-Hyun) is a high school student. She is pretty and smart. She seems like cheerful person, but her parents died when she was young. Since the death of her parents, Kim Jo-Jo has lived with aunt's family. Living there is not easy for Kim Jo-Jo. She doesn't download the app Joalarm.
Meanwhile, Hwang Sun-O is a popular male student at the same high school where Kim Jo-Jo attends. He is the son of a wealthy family, but he is not loved by his parents. His best friend Lee Hye-Young also attends the same high school. Hwang Sun-O notices that his best friend Lee Hye-Young likes Kim Jo-Jo. Hwang Sun-O wants to know if his friend really likes her, so he kisses her.
When the Camellia Blooms is a story of Dongbaek, an orphan who grew up to become a single mom. She owns a small bar, also called ‘Dongbaek’ which means camellia in English. Her life takes a new turn after meeting Yongsik, a do-gooder police officer in their small town. They fall in love despite social stigma against single parenthood. Yongsik, having been raised by a single mom himself, understands Dongbaek’s challenges and embraces her dearly.
Yoon Jong-Woo is a man in his 20's. He has lived in a small town for all of his life, but he gets a job at a small office in Seoul. Yoon Jong-Woo moves out to Seoul and stays at a cheap apartment which shares its kitchen and bathroom with other residents. He doesn't like staying at the apartment and he doesn't like the other residents who seem weird and suspicious.
Stuntman Cha Dal-geon gets involved in a tragic airplane crash and ends up discovering a national corruption scandal in the process. Go Hae-ri, the oldest daughter of a deceased marine, decides to work for the National Intelligence Service as a secret ops agent in order to support her mom and younger siblings, although all she wanted to do is to become a civil servant.
Music producer and composer Ha Rib made a contract with the devil to trade his soul for fame. This devilish transaction brought him all the fame he could ask for, producing many hit songs. As the contract expiration draws near, he bargains with the devil for an extension. For that, he must find another person to sell the soul. Ha Rib finds a perfect candidate, but contemplates because she would have to suffer for 10 years for his selfish fame.
Wie Dae-Han (Song Seung-Heon) is an ex-lawmaker and is a materialistic kind of politician. He wants to get elected as lawmaker again. One day, 18-year-old girl Da-Jung (Roh Jeong-Eui) comes to him. She tells him that he is her real father. Her mother raised four children, including Da-Jung, alone, but she died in a hit-and-run accident. Da-Jung is the only one now taking care of her 3 younger siblings. Wie Dae-Han accepts Da-Jung and her 3 younger siblings. He carries out “The Great Show” to become a lawmaker again.
Eun Dong-Joo attempts to get back her stolen life. When she was 6 years-old, she was abandoned at an orphanage. She did not remember anything except her name. Despite her difficult environment, she has grown into a woman with a positive and bright personality.