London, 1868. Violet Tennyson arrives in the capital of the British Empire as an orphan, accompanied by a strange Sentinel and welcomed by a family who only wants to marry her after finishing her last year at the prestigious Covenant Academy. But as her days begin to pass between classes, uniforms and veiled glances, her lie begins to crack. And not just because the idiot Sid Tennyson seems determined to make her life impossible. Violet keeps a secret. A secret that condemned the one she loved most and that has led her to the Covenant Academy. A secret that has too much to do with four students who are rumored to become legends. The countdown has begun. Time is running out. The time has come to dance one last waltz.