Prince Kyungsoo of Vallis was never set to inherit the throne because he was born an omega. Thus, being sent off to marry Crown Prince Chanyeol of Zerura was an even bigger blow to him. However, Chanyeol doesn't want this marriage as much as Kyungsoo does and they conspire to give each other what they want, only to end up unraveling more secrets and having to face unresolved feelings.