What happens when a regular girl and her best friend find themselves in a completely different world from their own?-- At least she thinks it's a world. Park Minseok and her best friend Fang Hua Liu found themselves in a strange world called 'EXO'. While trying to find their way back home, they encounter 12 brothers who claim to be 'EXO-M' and 'EXO-K'. What will happen when they find out the truth?