Something's happened, and about 2/3 of the population are zombie-like berzerkers who like nothing better than to eviscerate or otherwise pulverize the "healthy" 1/3 of the population.

You're either a human, or a hater.

Danny McCoyne is a hater who has very real memories of his wife and daughter, and some crumb of humanity that messes with the killing program.

Interesting premise and not a bad read.