A Dark Foe (2021)

A guilt-ridden FBI agent remains haunted by the abduction of his sister and trapped in the painful memory of the day she was taken. Suffering from nyctophobia, an irrational fear of the dark, he is forced to confront both his own condition and the cunning serial killer behind her disappearance. His investigation leads him to a mysterious former prostitute as he searches for a way to catch the vicious killer.