Although they are the closest twin sisters, due to their parents' divorce and mother's emigration, they have been separated since childhood and have no knowledge of each other's existence. The elder sister is a superstar in China, but the younger sister is a top student at a certain university in the United States. The two parallel lines originally intersected due to the elder sister's accident. In order to save her sister and find out the truth about her accident, she had to agree to the request of a big family and go back to temporarily play the role of her sister. However, fate made the two sisters emotionally entangled with the same man. Why did my sister have an accident? Can my sister accept the transformation from an ordinary student to a super idol? Where should the love and destiny of the two sisters go...