When twelve-year-old Kumana drags his artistic sister Jiona on an adventure to find a legendary "book lady" in the big city, they never expect to be mistaken for dangerous aliens! Their translucent skin makes them targets for paranoid government agents and hostile locals who want them captured-or worse. Now the siblings must use Jiona's magical web-weaving skills, Kumana's quick thinking, and help from unexpected allies to escape a city that sees them as monsters. Can they make it home alive, or will their innocent quest turn into their worst nightmare?