Hotel Del Luna ini merupakan sebuah hotel seperti hotel pada umumnya. Yang membedakan hotel yang terletak di kota Seoul ini dengan hotel lainnya ialah costumer mereka yang semuanya adalah hantu.
Dan dari tempat inilah 2 makhluk bertemu, dimana Jang Man Wol (IU) merupakan seorang CEO dari hotel tersebut yang terjebak karena sebuah kesalahan besar dan mengakibatkan dirinya terjebak begitu lama di hotel tersebut.
Namun ia tidak menyangka bahwa dirinya bertemu dengan seorang pria yang mengalami sebuah peristiwa tertentu, lalu menjadi manajer di hotel tersebut.
Jenny Jang (Kim Sun-A) is poor and works at bathhouse in Gangnam, Seoul. She starts a new job as a housemaid for a conglomerate family. She becomes successful and then runs J Boutique. She also begins work as a lobbyist. Jenny Jang gets involved in an international city development project.
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.
Moon Suk-Goo works as a manager at Cheonrima Mart, which belongs to the Daema Group. Cheonrima Mart's future looks bleak as they don't have many customers and Moon Suk-Goo is frustrated by the store's situation. One day, Jung Bok-Dong, who was an executive at Cheonrima Group, is demoted to the CEO position at Cheonrima Mart. Manager Moon Suk-Goo begins to have hope that the store will experience a turnaround with the new CEO. In actuality, Jung Bok-Dong wants to destroy Cheonrima Mart to take revenge on the parent company for his demotion. Unexpectedly, Jung Bok-Dong's actions soon causes the store to attract customers.
A romantic comedy which is about a timpanist witnessing a murder case but cannot remember anything about what happened. With the help from a mysterious guy, she attempts to recover her memories from that day.
Ki Moo-Hyeok, a lawyer with a high winning rate, only cares about money. Due to a murder case at a high school which he deals with, his reputation as a lawyer hits rock bottom. To regain his good name as a lawyer, he sneaks into the high school and work as a temporary teacher. He tries to reveal a secret which the students have, and gets involved with Teacher Ha So-Hyun, a P.E. teacher who loves her students. They then face the students'secret.
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.
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.
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.