
Prince Sevien meets Isola, a woman trapped in a nominal political marriage. Mistakenly thinking she loves her cruel husband Harlowe, he imprisons her in the palace west wing out of fierce possessiveness. In fact, Isola marries Harlowe to avenge her slaughtered family and uncover his treason conspiracy. During long-term detention, suspicion and attraction tangle between them. As they dig up old royal crimes and fight Harlowe’s schemes, Sevien abandons his obsessive desire to cage her and learns to respect her freedom. They jointly expose the decade-old massacre case, defeat the villains, and fall in love based on equal trust after countless painful misunderstandings and dangerous struggles.