FBI agent Lily Yu is living at Nokolai Clanhome with her fiance, Lupi Rule Turner, when an intruder penetrates their territory and steals the prototype of a magical device that the clan hopes will be worth a fortune if a few bugs can be worked out. But the protoytpe can be dangerously erratic, discharging a bizarre form of mind magic and it looks like the thief wants it for that very side effect. Worse, whoever stole the device didn't learn about it by accident. There's a Nokolai traitor in their midst. Lily and Rule have to find the traitor, the thief and the prototype.