For three months, anonymous love letters have been arriving at Emma's door—intimate, poetic, written by someone who knows her deepest self. The mystery sender has watched her midnight walks, remembered her forgotten dreams, and put into words everything she's been afraid to feel. But when her best friend Lily announces her engagement, Emma's heart stops—because she recognizes the cream-colored stationery, the elegant handwriting, the turn of phrase that's been setting her soul on fire. He's been writing to Emma, pouring out his heart in secret, while planning a future with someone else. Now Emma must decide whether to speak up and shatter everything, or stay silent and lose the only person who's ever truly seen her.