This is a romantic mystery drama that will depict a murder and a romance story taking place in a luxury hotel. Nam Sang Hyo is the manager for the wedding department of a hotel. She is a perfectionist with a bright personality. She meets her ex-husband Koo Hae Young 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 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. Eun Joo works as public relations manager for the hotel. She is ambitious with her work career .