A stolen bottle of demon smoke causes the lives of five young adults to intersect: Tash, a streetwise demon hunter; Catherine, a shrewd princess whose father is plotting against her; Ambrose, an idealistic soldier turned traitor; March, a servant on a quest to avenge his family; and Edyon, a charming thief with no clue about his true identity. As war approaches, they must navigate a tangled web of political intrigue, shifting alliances, and forbidden love in order to uncover the dangerous truth about the strangely powerful smoke that intertwines their fates.