SYNOPSIS

Ahn Dae-sung is a genius with perfect memory, but he has failed the 9th grade civil servant examinations for the past 3 years. Do Ah-hee is a local police officer and Dae-sung's girlfriend. Han Myung-sook is the owner of MS Supermarket and Dae-sung's mother. When a mysterious murder takes place near Ah-hee's apartment, the three begin investigating to find the killer.