Chloe, the daughter of a viscount, carries the full memory of her previous life as the chief magical-tools artisan of a kingdom that fell a thousand years earlier. In that life, she followed the orders of her nation and created countless weapons designed solely for slaughter. Haunted by regret, she resolves in her new peaceful era to atone by dedicating herself to crafting magical tools that protect and aid people, not harm them.

Her quiet, research-focused life is shattered during the academy graduation party when her best friend, a duke’s daughter, is publicly accused of fabricated crimes by her fiancé, the first prince. The prince’s false charges are clearly a scheme to replace the fiancée with his lover, the manipulative Priscilla. Unable to watch her friend be wronged, Chloe steps forward and systematically dismantles every lie, exposing the prince’s plot with calm, logical evidence. Her victory saves her friend but makes her a dangerous target. Realizing the prince will stop at nothing to eliminate her, Chloe accepts the help of Oscar, the second prince’s son and the knight brigade’s vice‑captain, who also happens to be her best friend’s older brother. He arranges for her to flee to a neighboring country, where she can continue her work in safety.

Yet the prince and his allies refuse to give up. A year later, back in the kingdom, Chloe is again cornered at a royal event. This time she is accused of attempting to assassinate the king by using a cursed magical tool, and she is presented with three false witnesses—a missing magical-tool artisan, a maid, and a physician—who each recite well‑rehearsed lies. The crowd turns hostile, and the prince demands her immediate execution. But Chloe, with Oscar and the wise second prince’s uncle standing by her side, remains composed. She refutes each accusation with unshakable logic and her own vast technical knowledge, revealing the contradictions and motives behind the staged testimony. The truth slowly wins over the audience, and the conspirators’ scheme unravels.

Throughout these ordeals, Chloe’s depth of character is shaped by the contrast between her horrific past and her present moral compass. She is a brilliant inventor who wields proficiency in magic and technology far beyond her era, yet she uses it only to defend or build, never to destroy. Her relationships with Oscar—who respects and protects her despite knowing her past—and with her loyal childhood friend provide emotional grounding. The story’s arcs examine justice, redemption, and the misuse of power, all wrapped in a setting where the scars of a forgotten war linger and the echoes of Chloe’s former life continue to influence her choices.