When fifteen-year-old Lucy Willows discovers that her father has a secret child from a brief affair, she begins to question everything she thinks she knows about her family. How could her father have betrayed them like this? How could her mother forgive him? And why isn't her sister rocked by the news the way Lucy is? Lucy can't bring herself to tell her friends, and when she tries to confide in her boyfriend, he doesn't understand. Fed up with everyone around her and desperate for answers, Lucy runs away to Maine--the home of her mysteriously estranged grandfather--to get to the bottom of her family's secrets and lies.