Saffy Huntley-Oliver is beautiful, charming, rich - and in her spare time she's a serial killer. For the past fifteen years she's been hunting down and killing bad men: rapists, murderers, domestic abusers. As a hobby, it's not as Instagrammable as baking, but at least it's better for your thighs. The problem is, that it's hard to sustain a healthy relationship when you're expecting to have to kill your boyfriend at any moment. She's lost her faith in mankind. That's why she's decided to look for a good man instead - preferably one who shares her interests.