Being the daughter of a world-renowned scientist, Sienna Peters has struggled to carve out her own career in the field. But her world is sent spinning when she discovers a secret species being held in the lab where she works, and the horrible things being done to them. Compelled to do more than hand off an information-packed jump drive to her father, she sets out to free the creatures.

The minute his team enters the compound, federal agent Warrick Donovan knows their mission will have more trouble than they bargained on. Unfortunately, trouble comes in the form of Sienna Peters, the younger sister of his close friend. Now not only does he need to save her pretty ass, he needs to discover just how involved she is with the imprisonment of the shifters.

Sienna knows she should trust no one—not even the man she might still love. But as the danger escalates and past passion ignites, her heart has other ideas. Even when the shroud of mystery is ripped off more than one stunning truth…

Warning: Must love alpha males, be intrigued by federal agents who may or may not shift into wolves, and most importantly be prepared for intense action of the dangerous and sexual kind.