Chae Yi-seo, a woman who distrusts men and lives alone, and Han Do-jin, a man driven by a desire for revenge through deception, form an unlikely alliance. Their arrangement is straightforward: a passionate relationship for the sake of appearances, with no intention of marrying someone they despise. However, when Do-jin suddenly shifts his approach, declaring a desire for friendship, Yi-seo is left confused and perplexed by his newfound warmth and friendliness. As she navigates this unexpected turn, she must decide whether to trust this unpredictable man, whose lies are as captivating as they are dangerous. Can their friendship be genuine, or will Do-jin's true intentions ultimately prevail?