An overwhelming mating lust pulls mates together in this world where werewolves mate in threesomes.  Sheriff Caleb Couteux comes to Marysburg to investigate Ted Seabolt, former Alpha of Stonewall pack, but gets more than he bargained for when he discovers his mates.  Best friends for years, Fiona and Grady fought the love between them until the mating lust draws them together...with Caleb.  But Grady sees Caleb as an interloper, and Caleb feels left out of their twosome.  Can they solve their relationship problems in time to face the trouble to come?