When Kris Parker was ten years old, her father brought her to their lake house to spend the last few weeks with her dying mother. It was one of the most difficult times of young Kris' life. Luckily she had someone to help her through it: her imaginary friend, Violet. After her mother's death, Kris left the house. Now, twenty years later, Kris has returned to the lake house to recover from yet another family tragedy. With her is her eight-year-old daughter, Sadie. But what is supposed to be a summer of healing soon becomes an odyssey of unspeakable horror--for Violet has been waiting years to play with Kris again.