From childhood Kim has been Jeff's secret companion. He protects Jeff from bullies, provides the answers to difficult exams - and pulls him through whenever the going gets tough. The only trouble is that Kim is invisible. Jeff is the only one who knows he exists. But when Jeff enters boarding school, he finds his troubles have just begun. For Kim is more than just a playmate - Jeff's mysterious sidekick is a vicious, hell-spawned creature intent on possession his body and soul.