"How Beautiful Is Perfection" tells the story of Tianle (Jiang Wu), a car repair engineer who is down and out and accidentally gets a key from an old man that can travel through different worlds. This key can take him to a new world where he is rich and powerful and has a happy marriage with the school beauty Zhuo Yanni (Jiang Qinqin). Cheng Tianle frequently shuttles between the two worlds, enjoying the warmth of his family in world A on one hand and the luxurious life of the rich in world B on the other, but gradually becomes confused about the perfect life he pursues...