When she discovers her husband's infidelity and demands a divorce, he chillingly refuses, revealing a dark obsession with keeping her by his side despite his own cheating. Betrayed and seeking revenge, she decides to give him a taste of his own medicine by starting a scandalous affair with his childhood friend—the Crown Prince. However, as the prince treats her with genuine, gentle affection, her heart begins to waver. Caught in a dangerous web of retaliation and toxic obsession, she must figure out where her true feelings lie.