About the time that her father was diagnosed with cancer, Jade invented Zoe, an imaginary friend in the pages of her notebook that she could depend on; then one of her classmates, Gresham Gorham (called Clue), somehow brings Zoe to life, and Jade suddenly has a best friend, one she can still control by what she writes in her notebook--but soon Jade begins to wonder how much a friendship is worth if you are calling all of the shots, and whether she should let Clue return Zoe to the notebook, and so rejoin reality herself.