Atticus is having a bad deity.

Atticus O'Sullivan, last of the Druids, lives peacefully in Arizona running an occult bookshop and shapeshifting in his spare time to hunt with his Irish wolfhound. His neighbours and customers think this handsome, tattooed Irishman is about twenty-one years old when, actually, it's twenty-one centuries. Atticus draws his power from the earth, possesses a sharp wit and wields an even sharper magical sword known as Fragarach, the Answerer.

Unfortunately, a very angry Celtic god wants the sword, and he's been after Atticus for centuries. Now the determined deity has tracked him down and Atticus will need all his powers - plus a seductive goddess of death, his vampire and werewolf team of lawyers, a sexy bartender possessed by a Hindu witch, and some good, old-fashioned Irish luck - to kick some Celtic arse and deliver himself from evil.