Being raised in the sheltered Northern Zone of the City of Eternity, twins Alexander and Valentyna dream of escaping the confines of their carefully controlled lives. Their father, ever protective, forbids them from venturing far, only allowing them brief, supervised visits to other zones. But the quiet streets and familiar shops of their neighbourhood feel suffocating, and the twins long to explore more of the city's forbidden places. When they stumble upon their father's hidden stash of neutraliser-a rare substance that masks the scent of human blood-they seize their chance. With the neutraliser in hand, Alexander and Valentyna decide to sneak into the Eastern Zone, the vampire-ruled district, to visit their old family home, now sealed off and lost to the supernatural lands. But the neutraliser doesn't work as well as they expected, and soon their scent draws the attention of deadly predators. Chased through the Ruby District by creatures hungry for their blood, the twins are forced to confront the dangers of a world they barely understand. As they fight to survive, they uncover dark secrets about their family's past and the true power dynamics of the city. Their bond is tested as they navigate treacherous alliances and the volatile underworld of the vampires, where the line between friend and foe is razor-thin. In Blood & Bond, the finale of the City of Eternity series, Alexander and Valentyna must rely on their love for each other to make it out alive. But in a city where revolution is brewing and ancient prophecies unfold, survival comes at a cost. Blood binds-and blood betrays-and the twins will discover just how far they're willing to go to protect each other.