Annie is the backbone of her family who works as a female employee at a well-known company owned by Mrs. Cellia. Because of her excellent performance and good character and cleverness in reconciling the employees at the company, Mrs. Cellia recorded Annie's position as assistant to her three adult grandchildren. She believes that Annie can educate them to be polite and Annie can make her three grandchildren get along. 

Mrs. Cellia's grandchildren have different traits and characters. And the three of them don't get along with each other because...