Seventeen-year-old Kira Wolf is a math genius. She's starting her freshman year at the University of Waterloo. But she's also a Walker, member of an ancient magical race. Her best friend Germain is a wizard who likes to have adventures. The night before her first day of classes, he asks her for a little favour-which, predictably, spirals out of control. The world of magic is complicated, and dangerous, and Kira and Germain are playing with forces far beyond their control.