Graciella Ortiz is a DEA agent, and part of the demon hunting Shasha's Team. She discovers there is something different about her, something she was never told by her mother. 

Grace's secret is that she is actually a shape changer, a wolf. She finds out that her first change is dangerous, and not something to go through alone. 

On a case in Northern New Hampshire, she comes across a pack of people like her. She must fit in or take the chance that the Changing will kill her.