In Seoul, many accidents can happen, but can be brushed off quite easily.

Meet Kim Myungsoo, at first glance he seems to be a cold person, with looks that can kill, but is quite down-to-earth (and still good-looking) if you know him. While pacing around, he was a victim of such accidents. Luckily, he didn't suffer from any serious injuries. However, since that accident, whenever he falls asleep, he dreams himself in the same place with the same girl.

His dream girl: Kwon Seoyeon. Pretty and is quite harsh. According to her group of friends, After School, she has a (slightly) tough exterior but she can turn soft and delicate in a matter of seconds. 

He wants this girl to be real and looks for her. However, his group of friends, Infinite, brushes it off and declares it as a mere coincidence. 

What happens when he sees this dream girl in real life but everything isn't as he seems?