Reborn after a tragic death, Quinn Calloway refuses to repeat the mistakes of her past life. Once destined to become commander of the Royal Tidal Guard and marry Hunter Sloan, she now chooses the deadly Abyss instead, surrendering both power and love to her sister, Sienna. But the deeper Quinn ventures into the war-torn trench, the more she uncovers hidden conspiracies, ancient powers, and the truth behind the people she once trusted. Alongside the mysterious Jace Sheridan, Quinn rises from a broken outcast to a fearless commander. As jealousy and revenge consume Hunter and Sienna, Quinn must decide whether to keep fighting the past—or finally embrace a future of her own.