Shanghai, November 1937. Yaya, the eight-year-old daughter of a diamond merchant, lives a life of luxury in the French Concession in Shanghai. Her one great passion is the piano. While she is preparing for an important audition, her father decides that the family must leave town in the face of the imminent Japanese invasion. The evening before all the family is to leave, stubborn Yaya, unaware of the danger, runs away in an attempt to make it to her audition come what may. On the way, in the midst of the crowd fleeing the Japanese offensive, She is caught in a bombardment. She owes her life to Tuduo, a street urchin who discovers her unconscious in the ruins of a house. With his help, Yaya learns that her family fled for Hong Kong without her, and she determines to go join them there right away. Tuduo begins to dream about what his life would be like if Yaya's parents welcomed him and his little brother into their beautiful home. He decides to go along with Yaya on her long and perilous journey. But before he can do anything, he must escape from the clutches of Zhu, who runs a gang of homeless boys. When Zhu learns that Tuduo's little prot
