The biggest questions in Mark Tilesbury's life have generally been fairly straightforward: How exactly did he end up as the assistant to celebrity psychic Greg Rambler? If the dead are getting in touch, why are they always so happy about things? Why is it always him who buys the drinks after the show? Things get a lot more complicated when a chance meeting with a very strange man lands him in the middle of a war between the last remnants of the angels and the creatures from the other side of the mirror. A war in which it turns out Mark might very well be the ultimate weapon. Kidnapped by a woman who seems far too ready to pull knives out of thin air, he must travel the length of the UK, dealing with crazed angels, estate agents with afterlives for sale and occasional VW campervans, trying to find a way out of this mess before either the angels kill him for his own good or the Glass catch up with him. Ultimately, he has to decide if perhaps the scariest thing in the mirror isn't... well, him.