McKenna Caffry learned about demons when they attacked her carriage a little over one year prior. Now she's finished her training and is ready to prove her worth to the people that changed her world. She's not thrilled with her first mission - watch over the Royal on a mission to rescue captured Alliance member, Kellan. Being a nanny was not what she joined the Alliance for and none of the others on the mission had been given such a lowly task. It doesn't help that his smile sends waves of lust through her every single time. Jacob Tresay III is one of many bastard sons of the King. As a distant Royal living in court he is exposed to the knowledge that demons run amuck in the London Underground, and all over the world. When his father demands that a Royal be present on a rescue mission he volunteers for the job to get out of court. The open seas awaited him, if he could only shake his personal Alliance assigned guard, even if McKenna set his body on fire. Finding one of few open entrances to hell will take them to the middle of the sea. But what awaits them when they find the entrance is the most dangerous thing a sailor can encounter, Sirens. McKenna and Jacob must see what passion lies between them if they are going to make it past the sea demons and rescue Kellan. And themselves.