Nam Sang Hyo (Yoo In Na) is the manager for the wedding department of a hotel. She is a perfectionist with a bright personality. Nam meets her ex-husband Goo Hae Young (Jin Yi Han) as a client at the hotel. Sang Hyo and Hae Young were in love and married 7 years ago, but they divorced less than 100 days later. A murder case in the hotel gets in the way of the wedding and throws the characters into unexpected situations.

Meanwhile, Jo Sung Gyum (Nam Goong Min) is the management director of the hotel and Sang Hyo’s boss. The murder case that brings about a crisis at the hotel is related with his personal history. He is in a love triangle with Sang Hyo and Eun Joo (Lee Young Eun). Eun Joo works as public relations manager for the hotel. She is ambitious with her work career.