The Templar, the Queen, and her lover

Isabella, Queen of England, has been dispatched to France in an attempt to bring about peace between the two countries, and Baldwin must accompany her. But the day after their arrival, a servant is found murdered, with Baldwin's dagger lying next to the body. As Baldwin struggles to prove his innocence, the killer strikes again. With so many English enemies gathering in Paris, will Baldwin be able to expose the culprit in time to protect the English King?