In the summer of 1986 in a small Chinese village, ten-year-old Junie receives a momentous letter from her parents, who had left for America years ago: her father promises to return home and collect her by her twelfth birthday. What Junie doesn't know is that her parents, Momo and Cassia, are newly estranged from one another in their adopted country. In order for Momo to fulfill his promise, he must make one last desperate attempt to reunite all three members of the family before Junie's birthday -- even if it means bringing painful family secrets to light.