Cass is a normal 25 year old woman. Well, except for one thing that is. She actually finds it kind of embarrassing. Cass is secretely a serial killer and a good one at that. One might actually call it a talent or a gift. But Cass doesn't take pride in this, she is actually trying to quit! Sadly it's not that easy. She loves to kill people after all. So what happens when suddenly the earth gets attacked by aliens, set on dominating the planet? Can Cass put her skills to use for the better good or will she take this chance and kill everyone in her path, human and alien alike? Well, at least two things are for sure; she's got all the time in the world and all the knifes to spare.