After Esther Vaughan disappears from her Chicago apartment, her roommate finds a haunting letter addressed to someone she can't identify. Meanwhile, eighteen-year-old Alex quickly befriends a mysterious woman who appears in the coffee shop where he works. As the people in Esther's life search for answers, Alex's relationship with the woman turns dark and sinister, and nobody is safe from Esther's murky past.

Includes readers guide.