Twelve-year-old Zach Clark has some pretty common troubles; single mom, bully at school. But he's also got one problem all his own when he wakes up one morning on the ceiling. Gravity seems to have no effect, and one false step will send Zach toppling up into the sky, gone for good. Zach and his friend Sophie try to hide his condition and then cure it, but soon enough their luck runs out and forces close in on them from all sides. A thrilling fantasy...