For Batwoman, the fight against crime is a family affair. Her father, a colonel in the American army, has always been her mentor. Her cousin, Flamebird, is now her companion. When in Maggie Sawyer, her fiancée, she is the captain of Gotham's police. But will their union be sufficient to stop the threat of the "Cult of Crime" that is weighing on the city, and whose leader is none other than her sister Alice, one of her greatest enemies? Will Batman have to intervene?