Sana has always felt like love stories are only meant for other people. She's convinced she'll never find the kind of connection she reads about-until one day, a handwritten letter slips out from under her apartment door. It's addressed to "The Girl in 3B," her apartment number, but there's no name or return address. The letter is filled with words of longing, hope, and someone's raw, hidden heart. Curiosity turns into obsession as more letters appear, each one more personal than the last, revealing the writer's deepest dreams and fears. With every word, Sana finds herself connecting with the person behind the letters, who seems to know her in ways that feel too intimate to be chance. She starts writing back, leaving notes under her door at night, pouring out the feelings she never dared to speak. Twist: The man writing the letters is closer than she thinks-someone she sees almost daily. But he's struggling with his own painful past, one he's hidden behind a charming smile. When she finally meets him, Sana learns the true reason he chose her for his letters, and it forces her to confront her own wounds and fears.