Hidden FaceEpisode 1

Seong-jin , a conductor whose fiancée, Soo-yeon, a cellist in his orchestra, mysteriously disappears, leaving only a video message. Devastated, Seong-jin finds himself drawn to Mi-joo,who replaces Soo-yeon and a secret relationship blossoms between them. However, their desires lead them to commit an unforgivable act in Soo-yeon's home, while she is secretly trapped in a hidden room within the house, forced to witness their actions