The divorce of Emperor Ampelian and Imperial Consort Davi of Karulia is a disaster. Faced with his chancellors voting against him and his mistress, Lady Isla, Ampelian forces the vote through during a lunch recess, and imprisons Davi in the Gardenia Wing.

With his petitions for their return going unanswered, Davi's father Duke Tiago makes a last-ditch effort to save them by hiring the dashing sky-pirate Captain Topaz Bandrake. Topaz and the crew of the Treasure Chest must break into the emperor's engagement party and rescue Davi in the middle of the night.

But it appears Topaz has other ideas, as Davi's abandonment tugs on his heart in a way he's never felt before...