Kimmy can't be scared. In fact, she's not allowed to be scared. If Kimmy is frightened badly enough, her fragile heart might just stop. Because of her heart condition, Kimmy resigns herself to low-risk activities like chess, and role-playing games online. But she's nearly 13 now, and all she wants is to go to the school Halloween horror maze with her friends. She knows her mom will say it's too risky, so Kimmy must find a way to prove to herself and her parents her heart is stronger than her fear.