Austere Grimm is a thief. Orphaned at a young age, she was taken under the wing of the House of Spades, where she was trained in the arts of deception and escape. She is an ace of the House she belonged in, but after rebelling against a wrongful order, she falls to her demise but is saved by a devilishly gorgeous man who strikes a bargain with her in exchange for her life. Forced to infiltrate a court where secrets are deadlier than steel and barbaric champions see her as an easy prey, she struggles to keep her head in place. But as the walls whisper tales of the past, an ancient evil is awakening and it may have something to do with Austere's own origin.