12 years old Li Wan has lost her mother long ago. When she grew up, her father remarried.
Not long after, Li played with a half-brother. This series of events lead to adolescent Li play has become strange and silent, in order to appease and divert the daughter inside depressed, father bought a lovely dog, hoping it can replace himself with his daughter.
Li Wan and the puppy soon established a deep affection, she named the puppy "Einstein"". Unfortunately, an accident happens changed everything...