You can't change your DNA . . . even when it says you're a murderer.
When Davy tests positive for Homicidal Tendency Syndrome, aka "the kill gene," she loses everything. She doesn't feel any different, but genes don't lie. One day Davy will kill someone.
Uninvited from her prep school, Davy is thrown into a special class for HTS carriers. She couldn't be more different from her fellow classmates, especially Sean, whose "H" tattoo is proof of his violent past. But with no one else to turn to, Sean might be the only person she can trust. Maybe he's not as dangerous as he seems. Or maybe Davy is just as deadly.