A gifted musician inherits a mansion after her long lost father dies under mysterious circumstances. She discovers his last musical masterpiece riddled with cryptic symbols that unravels an evil secret.

Nine translators, hired to translate the eagerly awaited final book of a bestselling trilogy, are confined in a luxurious bunker. When the first ten pages of the top-secret manuscript appear online, the dream job becomes a nightmare.

Due to that accident, Yi-Young loses her memory and Soo-Jin goes missing. Under that situation, Yi-Young regains her diving skills, but her strong desire to keep her position as a diva and Soo-Jin's disappearance push her into madness.