Maggie O'Brien, a nurse and medic on a SWAT team, has a longing to heal, a thirst for justice, and a chip on her shoulder. She lives in the shadow of her father, a famous (or infamous, depending on how you look at it) cop. A great deal is expected of Maggie - after all, she's Tommy O'Brien's kid. Maggie wants to put as much distance between herself and her father as possible, but is she more his daughter than she wants to admit? The question hits home when Maggie feels the desire - like anyone who deals with the worst elements of society - to dispense her own brand of justice. Soon she finds evidence that someone else may be acting on that desire. A killer is waiting and watching from the hospital halls and from the shadows. Maggie's search for the truth is a searing tour through the shades of gray between the impulse to heal and the urge to punish.