A seductive stranger prowls the streets of Glasgow in search of prey: unsuspecting men who fall under her spell.
Anna returns home after spending time in a psychiatric facility following her mother's tragic death and discovers that her mother's former nurse, Rachel, has moved into their house and become engaged to her father. Soon after she learns this shocking news, Anna is visited by her mother's ghost, who warns her that Rachel has evil intentions.
Two young soldiers, Bartle and Murph, navigate the terrors of the Iraq war under the command of the older, troubled Sergeant Sterling. All the while, Bartle is tortured by a promise he made to Murph's mother before their deployment.
