Oh, those bad, bad monkeys
Wouldn't it be great if there was an organization keeping track of all the nasty and evildoing people in the world? And if that Organization took the logical next step and ensured that those people--those Bad Monkeys, if you will--met a rather earlier death than later, due to natural causes?
Jane Charlotte herself is what many would consider a bad monkey--a runaway, a woman with some drug abuse issues and other dark secrets in her past, including a whopper about her brother and his disappearnce--who is tapped by an Organization to eradicate truly Bad Monkeys.
But Jane struggles with what it means to be good. Or does she? You'll simply have to read to the absolute end to find out.