One Step

Si-hyun is left with no memories of the car accident she has just been in and her past. However, the accident causes her to see sounds in color which disorients her forcing her to cover her ears. She then encounters Ji-won in the hospital and moves in with her. Upon hearing Si-hyun hum a strange melody in her sleep, Ji-won's brother Woo-hyuk writes it down and gives it to her hoping it would help her remember her past.