Kim Myungsoo, a Director of the Kingdom Mall mysterious, imperious, and likes to measure a person with money. He has it because of the nature of first love, Son Naeun died in a tragic way. One day he met Bae Suzy, a girl who has Indra to 6 and suffered from insomnia. Since that meeting, love begins to grow between them both, but one day Naeun Suzy asked for help to solve murder cases that range from 10 years ago. Suzy can help Naeun?