Thirteen is not a regular teenager He is a sixteen-year-old assassin working for a covert organization called White Moon. On top of that, he’s a hybrid, a genetically engineered being of human and animal DNA in a world where hybrids are becoming more and more unwanted everyday. Fortunately, for him, he can hide behind an alias and secrets older than this new world of problems and problem children. But when the two most important people from his past show up, and he receives orders to catch an assassin named Sorrow, he’s going to run into much more trouble than anticipated. Soon enough, Sorrow gets personal. REALLY personal. On a vendetta against the troublesome assassin, Thirteen may just have to join a rebellion to resolve the problem once and for all.