Katherine Mason's life had never been easy. As a single mother living in the basement of her brother's rowhome, the last thing she needs on a Friday night is for her ex to show up, unannounced, asking for a favor. After she begrudgingly agrees, she meets Joaquin Morales, a businessman with piercing eyes and a disarming smile. When her ex is found dead, she seeks out answers from the mysterious billionaire while he angles to use her daughter in his research into human blood. To find a cure.

Once Katherine learns the truth about the kind of man Joaquin is, she is forced to pick a side in a war she does not understand. Will she help him against the monsters that rule Philadelphia or simply walk away? It is a decision that will impact her family's legacy, the city's future, and rewrite history itself.