When it comes to girls (and in Colin's case, this was often proven), everyone has a type. Colin Singleton's type was... Katherines. He had dated nineteen girls.

All of them went by the name Katherine. And all of them - yes, all of them, up to the very last one - had dumped him.

Colin believed that the world is made up of exactly two types of people: those who get dumped and those who do the dumping. Many will claim to belong to both categories, but they don't understand the essence of the matter at all: you have a predisposition towards one fate or the other.

Those who get dumped may not always be the ones who break hearts, and those who do the dumping may not always walk around with a broken heart.

However, he is determined to prove the Theorem of Underlying Katherine Predictability, which he hopes, in its final form, will be able to predict the future of every relationship, seeking revenge for all the collectors of rejections and maybe, because you never know, he might even win the heart of the girl of his dreams.