Yin, a MBA graduate receives a special task from the manager to clean the office toilet for a month. Adding to his frustration, he receives a phone call while cleaning, saying his mother had a work injury. He rushes to the restaurant where his mother works as a dishwasher, but she refuses to leave until the dishes are done. Yin therefore substitutes her for a day. However, being unfamiliar with the procedures and inner workings of a busy kitchen, he causes a fiasco. Unbeknownst to him, this departure from regular work hints the reason he is given a special task.