Because of her looks, Yoon Haesol has always been pushed aside—in the classroom, even in group photos. The only place she truly belongs is when she's syncing moments in a video to the beat. One day on her way home from school, she picks up a black phone with just one app installed: ‘Yoon Haesol Settings.’ Appearance, Physique, Learning, Sense, Expression. With a swipe of her fingertip, she can adjust the numbers—and her real self changes too. But the five stats always add up to 100, and once a choice is applied, it can't be changed for 24 hours. Kindness and attention she's never known before—and, just as much, a slipping sense for editing and broken promises to her friends. As she prepares for the school film festival, Haesol must make a new choice every day between who she wants to be and the relationships she treasures. And then, the person who used the phone before her appears. A face everyone loves. A talent for everything. People who see you for exactly who you are. If you can't have it all, what will you keep for yourself?