一名内的联邦调查局特工陷入了对妹妹被绑架的痛苦记忆中,她患有一种罕见的疾病,称为“恐怖症”,对黑暗的非理性恐惧,将不得不与带走她的狡猾连环杀手对峙。A guilt-ridden FBI agent, stranded in the painful memory of the abduction of his sister, suffers from a rare condition known as Nyctophobia, an irrational fear of the dark, and will have to face-off with the cunning serial killer who took her away.