Six times Seraphina Vex has awakened on the morning of her twenty-fourth birthday. Six times she has married a prince. Six times she has watched him die within seven days, his life force devoured by a curse she cannot explain, cannot escape, cannot remember triggering. On the seventh timeline, she refuses every suitor with cold, ruthless precision, determined to outlast the loop by staying unwed. But then she meets Prince Darian Thorne, a forgotten royal with no magical power and a dangerous secret he does not even know he carries. He is the only man who does not trigger the curse. He is the only man who makes her fractured Resonance sing instead of scream. Together, they must unravel a millennium-old conspiracy before the seventh day ends, because Darian is not immune to the curse. He is the cure. And the villain who has been orchestrating her tragedy from the shadows is far closer than she ever imagined. The loop is breaking. The prison is cracking. And the realm of Aethelgard will fall unless Seraphina can break her own heart to save it.