Jiang Ziyu is a realistic person. His father died when he was three years old, and he lives with his mother and sister who are two years younger than him. According to his life plan, he just wants to get into a good university, find a decent job, take good care of his mother and sister who have worked hard for half his life. If he is lucky, he will marry a gentle and virtuous wife and give birth to a lovely baby, and then his life will be complete. If there was no fork in the road, he would be like all living beings, inevitably going through ups and downs but continuing along this path. But if it was just if, just like the clouds in the sky would change into unknown shapes in the next second, he could not predict what kind of traces the person named Su Muhe would leave in his life.