Right before her high society debut, Grace, daughter of a minor noble house, remembers her past life: she has been reincarnated as the doomed villainess of a web novel! In the original story, Grace bullies the heroine and meets a horrific end alongside her husband, Liam. But Grace knows the dark secret no one else does: "Saintly" Duke Liam, who is revered by the entire kingdom as a benevolent hero, is actually the secret Final Boss who puppet-mastered the whole tragedy! Trying desperately to avoid Liam to escape her doom, Grace's suspicious evasions end up intriguing him instead, forcing them into a high-stakes engagement. To make matters worse, Liam discovers she can't use magic, putting her at an extreme disadvantage against the kingdom's deadliest mastermind.