When his teenage daughter, Margot, fails to come home, widowed father David Kim becomes worried. He calls her piano teacher, only to find out that she quit taking lessons months ago. He asks her friends if they’ve seen her, only to discover that they either didn’t know her very well, or hadn’t spoken to her in years. Things only get worse when the police get involved, and he is forced to break into her laptop to provide them with useful information. In so doing, he learns that she had a whole life he didn’t know about, a life where she was depressed, and possibly didn’t even want to live anymore.