"I'm just seeing things." Insomnia has always given Tasmin strange hallucinations, but none unlike the night a mysterious creature sets its eyes on her. When a distant cousin, Harriet Myers shows up on Tasmin's doorstep, strange bruises, vivid nightmares and something more sinister begins to plague Tasmin's life. Devotion takes a twisted turn when Tasmin starts to lose herself in Harriet's shadow, becoming something else entirely.