Hae Sung is a science major at a prestigious university in the centre of Seoul. In her own words, she is a thoughtful and hardworking student who values independence. Others would call her, distant and mysterious. To that Hae Sung would most likely snort and chuckle. A hasty generalization she would comment before changing the subject. People closer to her would shrug and say "Hae Sung? She's just Hae Sung...". not that she's generic or anything, but Hae Sung famously favours her own company over others. End of sentence. It is therefore, when Hae Sung one day is witness to the murder of her classmate that she must see an end to her quiet days and work together with a diligent detective. I mean, who simply accepts the presence of a stranger in one’s mind? Especially when that stranger is a detective.