Serene was just proposed to by Jake, the heir to the prestigious Quentin family and a vampire. But the very next day, she receives an invitation to Jake's upcoming wedding to her adopted sister, Asta. Asta, full of pride and arrogance, flaunts the mark she's received from the Quentin family heir, signaling her official entry into the noble class, a social tier higher than Serene's ordinary merchant background. Enraged, Serene slaps Asta, who has betrayed her trust, and storms off to confront Jake. But the Quentin family rejected her, a commoner, taunting her audacity to question the vampires' right to choose their own Marked Ones. Vowing revenge, Serene attends an underground Hybrid Vampire gathering, determined to earn a mark for herself—only those marked by vampires are permitted entry into their exclusive banquets, and Serene plans to use the opportunity to get back at Jake. Her plan succeeds, and she gets the revenge she sought. But in an unexpected twist, she discovers she's pregnant... Now, the question remains: who is the father?