Thaddeus Esax has a grumpy werewolf problem. For a year, he's been mated to Sandulf Hunter, a ghost werewolf he brought back from the dead without meaning to. It's been great. Thad's been happy, and he believed Sandy was too. But Sandy has been sulking for more than a week, and Thad fears their relationship isn't going as well as he believed.
The problem with being mated to a ghost is that said ghost never can leave your side, and therefore it's extremely hard to keep secrets. Thaddeus wants to surprise Sandy, to cheer him up, but to do that, he has to trick him into believing they're doing something they're not.
Telling Sandy they're having a Halloween party doesn't go over well, but how do you trick a ghost? By making him believe he'll be dressed up as a pirate for an evening, of course.