The protagonist Smith is stuck in an immortal body that has made him lose the joy and feeling of being alive, and his view on the future has been shaped by his past, even though he has done everything in his might to forget and make up for it. His daughter Viktoria is his last hope of rejoicing happiness, and when evil once again shows itself, she is the only light he has left to assist him against it.   The Blue Light of the Heartdecayer is a book which tells something about the risk of dwelling in the past, and how it can affect the choices you make in the present. It touches subjects such as loneliness, loss and the anxiety, and at the same time tries to find answers to how you can overcome it, when it is most of all yourself who prevents you from moving on.