The Magnus Mar, a devastating rise in ocean levels born of the clash between krakens and leviathans, has left survivors but a handful of islands on which to live. The largest of these territories is the luxurious Archipelago, where the imperial government has, over the centuries, ruled with an iron hand. One day, a perfume-making contest is announced, aimed at soothing the Empress' tortured soul. Nimué, an apprentice in love with her job at the Tea Company; Lugen, the taciturn perfume maker; and Tydorel, an exuberant poster artist, are ready to risk it all to find the legendary flower that will enable them to win. Even if that means venturing beyond the seas into forbidden lands...