Carol has always taken the fall for her irresponsible and spoiled younger sister, Victoria right from when they were young. When Victoria reveals that she is getting married to a billionaire whom she does not know out of the blues, Carol is surprised and tries to talk Victoria out of it. On the day of the wedding, Victoria absconds, at which point Carol’s parents reveal the horrible reason why Victoria was to be married off to the billionaire to her. As usual, their parents want Carol to bail her sister out and save the family from shame and danger by doing the unthinkable...marrying her sister's fiancée. Now, Carol is married to this cold and brooding stranger, who himself only agreed to a contract marriage with her because he needs to find his missing ex. Carol begins to fall in love with him…but all of a sudden, she finds herself in a competition with the ex, who suddenly shows up just when Sebastian begins to fall for Carol too.