Choi Sang-Eun (Park Min-Young) is an attractive woman, with talent and charm. She works as a contract marriage master. Her job is to help her client have a perfect single life. She transforms herself for each of her clients. Her client Jung Ji-Ho (Ko Gyung-Pyo) has been in a marriage contract with her for 5 years, running on Monday, Wednesday, and Friday of the week. Jung Ji-Ho is a mysterious man. Her new client Kang Hae-Jin (Kim Jae-Young) is a popular actor. She has a marriage contract with him on Tuesday, Thursday and Saturday. Choi Sang-Eun becomes involved with her 2 clients and finds herself in a love triangle.
该剧讲述把结婚当成职业的崔尚恩(朴敏英 饰),陷入周一、周三、周五长期合约中的郑智浩(高庚杓 饰),以及周二,周四、周六新签合约的姜海振(金宰英 饰)之间而发生的浪漫爱情喜剧。