Lucía wakes up in a small, gray room with three of her best friends — none of them knowing where they are, why they're there, or how they got there. The only door is locked. On the opposite wall, a panel with a bright red button and a screen displaying a number: 1 in 1,048,576. The four friends are about to find out just how little they really know each other. Oh, and there's a raccoon, too.