The Werewolf Who Loved Me

She's descended from vampire royalty, gifted with a power she should not possess. He's a werewolf and former Supernatural Intelligence Agent, charged with protecting her at all costs. Neither anticipated they would have to marry in order to ensure her protection.
What happens when tragedy strikes close to home and the local Inspector is incompetent at best, or complicit at worst? Oh, and everyone they know is a suspect!
Can she convince her husband to investigate and begrudgingly allow her to help? Can they find the culprit without losing their hearts in the process?