Changleing

A single mother returns from work to find her nine-year-old son gone. She calls the police to search. Five months later, a boy is found in Illinois who fits the description; he says he's her son. To fanfare and photos, the police reunite mother and son, but she insists he's not her boy. The cops dismiss her as either a liar.
From this movie we can see a mother's love for her children . even though she did not find her’s son.