Twin sisters Malssuk and Seri share the same face.
Malssuk works two rotating shifts at a factory to help cover her younger sister Seri’s tuition.
Meanwhile, Seri lives a luxurious life—attending college during the day and earning spending money at night working in clubs.

Then one day, Seri becomes intensely entangled with Heecheol, the boyfriend of her older sister Malssuk, whom she met at the club…