In modern society, there are people who are neglected and suffering. They are often involved in unfortunate events, such as industrial accidents, and end up dying. Most of the disasters could be prevented in advance with little attention. However, some companies or public organizations tend not to prepare for potential accidents because of the high cost. That’s how industrial accidents take place. Doctor Detective is a drama where medical doctors treat the patients suffering from industrial accidents and look into the truth behind the accidents. The story of the drama starts when Joong Eun, who is an enormously talented medical doctor, gets to join an undiagnosed disease center(UDC) in the middle of experiencing difficulties in her personal life. And she starts to look into her patients' diseases caused by industrial accidents and work on revealing the truth concealed by those with power.
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.
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.
Justice menceritakan tentang kisah seorang pengacara, Lee Tae Kyung (Choi Jin HyukO) yang membuat kesepakatan dengan iblis untuk membalas dendam. Sementara, Song Woo Yong (Son Hyun Joo), merupakan seorang pria yang rela menjadi jahat demi keluarganya
Kedua pria ini memiliki kemiripan, yakni sama-sama membuat kesepakatan dengan iblis untuk mengabulkan keinginan mereka. Lee Tae Kyung mengumpulkan kekuatan dan kekayaan dengan berurusan bersama klien-klien kelas atas. Kasus yang ia dapat biasanya berasal dari Song Woo Yong yang merupakan pemilik perusahaan konstruksi.
Terdapat serangkaian kasus, di mana beberapa aktris dilaporkan telah menghilang dan membawa Lee Tae Kyung dan Song Woo Yong bekerja sama dan terlibat dengan kehidupan serta rahasia dari orang-orang kalangan atas. Hubungan mereka berakhir saat mereka harus saling mengandalkan satu sama lain.
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.
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.