Declan, the Harrison family's heir, marries Claire, the daughter of a wealthy tycoon, due to a family arrangement. However, on their wedding day, Declan is shocked to see that Claire, whom he's meeting for the first time, is a plus-size woman, nearly 300 pounds. The wedding guests quickly turn Declan into the laughingstock of the event. Reluctantly, Declan starts married life with this stranger, and Claire's intense love for him only adds to his stress. When Claire's efforts to protect their love inadvertently anger Declan, he, obsessed with appearances, cruelly takes out his frustrations on her, even criticizing her weight. Feeling deeply hurt, Claire decides to embark on a journey to lose weight, determined to make Declan regret his actions.