The premise of the Crossed series is that a plague has turned the majority of people in raving, depraved, cannibalistic lunatics. They develop a red rash on their face in the shape of a cross.
In this story, a group of survivors comes across Harold Lorre, who is trapped in a ravine. He's starving and injured--but he says that he can take them to safety, a place where they are developing a vaccine for the virus. They believe him. But he is conniving and has an agenda. In fact, he's able to kill members of the group one by one--and he enjoys it. It's almost as though he's one of the Crossed, though he doesn't have a rash and has most of is reasoning abilities--even though that reasoning is utterly insane.
I think this is the most harrowing Crossed graphic novel to date. The monsters are far worse than any "living dead" zombie because of the terrible things they can do to their victims. If this was a movie it would be rated NC-17. Recommended for those with strong stomachs!