Ik-hwan Choe	...	(Director)
Ik-hwan Choe, Joon-Seok Sol	...	(Writer)
Ye-ryeon Cha	...	Cho-ah
Ok-bin Kim	...	Young-eon
Seo-hyeong Kim	...	Hee-myun
Hyeon-kyeong Lim	...	Hyo-jung
Eun-kyeong Na	...
Ji-hye Seo	...	Seon-min
Byeong-hun Lee	...	Composer
Yong-heung Kim	...	Cinematographer

Summary: AKA - Ghost Voice or Voice Letter

While training after hours in her high-school, the aspirant singer Park Young-Eon is mysteriously killed and her body vanishes. Her ghost is invisible and trapped in the school, but her best friend Kang Sun-min, who broadcast in the lunchtime in school, is able to hear her voice. After the suicide of their music teacher, Sun-min, aided by her mate Cho-Ah, finds that another student, Hyo-Jung, died in the same elevator trunk some time ago. Meanwhile Young-Eon recalls details of her life, disclosing why she died.