When Suni, Gale, and Shi-woo set out to free their principal from what they think is an unwanted spiritual possession, they'll uncover a shocking truth about the school! Suni, Gale, and Shi-woo are new students at the Nightmute Academy. They also happen to be the only students. Well, the only students who aren't haunting the place, anyway. Nightmute is filled with all kinds of ghosts! Join them as they piece together and solve the mystery behind Nightmute...