On the surface, Luna Weir leads a perfectly normal life, but behind closed doors, she surrenders control to someone else-Jacob Dakota, who is sexy, charming and entirely dominant. The problem is that they only agreed to this power dynamic for a limited time. Jacob has never taken on training a submissive for more than three years at a time. However, as their end date draws near, he finds himself more reluctant to let go of Luna than he'd expected. To make matters worse, Luna's past returns in the form of the charismatic Bryan Walsh, her original Dom, who offers her another choice-to become his after her contract with Jacob expires. But there are secrets between the two of them that not even she can explain. With the future of their relationship unknown and a suspicious Dom waiting in the shadows, Luna's will to submit and Jacob's ability to lead are both tested like never before. Now they must decide if what they feel for each other is strong enough to hold them together beyond their contractual terms-for the measure of a Dominant is how willing their submissive is to serve.