Nightmare Dimension - The Plymouth Grey, #4

Reality around Plymouth is, shall we say, slightly iffy, even at the best of times. But even worse is when different dimensions get mucked about with. The Plymouth Grey - the secret group that protects Plymouth against paranormal threats - know this more than most as throughout their history they've dealt with attacks originating from dimensions far different to our own. A Grey operation on Halloween takes on a distinct turn for the weird for Misha and Cruz when they're thrown into another reality and meet someone they never expected to see.
As it is this would be strange enough, only they discover something far worse is happening - dimensions are being destroyed. And ours could be the next in line. But how can Misha and Cruz survive against vicious nightmare beasts roaming the countryside, let alone stop the dimension killer before it reaches our own?