When adopted heir Julian Hart is cast aside for the Caldwell family's biological son, he walks away and enters a provisional match with Ronan Vale, a powerful werewolf heir in the middle of a pheromone crisis. Their defensive contract marriage follows them from an emergency-medicine residency to Blackwater's elite rescue trials, where rivalry becomes trust and dependence begins to look like love. But a planted-evidence case exposes a larger conspiracy, leaving Julian and Ronan united as the investigation turns toward Julian's mentor.