Isabella spends three agonizing years serving as a scapegoat and surrogate companion for corporate magnate Lyon, who pines after her aristocratic stepsister Cecilia. Blinded by misconceptions surrounding an old rescue, Lyon subjects Isabella to ceaseless emotional disdain, treating her merely as a stand-in for his supposed true love.
When Cecilia schemes to trade brides to avoid wedding a mortally ill hereditary nobleman, Isabella accepts a hundred-million-dollar buyout to assume her sister's place at the altar. At the grand ceremony, Lyon lifts the veil only to realize too late that the woman who possessed his soul has married another.
