Changeling is a 2008 American drama film directed by Clint Eastwood and written by J. Michael Straczynski. Based on real life events in 1928 Los Angeles, the film stars Angelina Jolie as a woman who is reunited with her missing son—only to realize he is an impostor. After she confronts the city authorities they vilify her as an unfit mother and brand her delusional. The dramatized incident was connected to the "Wineville Chicken Coop" kidnapping and murder case. Changeling explores female disempowerment, political corruption, child endangerment and the repercussions of violence. 
Literally, a changeling is a creature found in Western European folklore and folk religion. It is typically described as being the offspring of a fairy, troll, elf or other legendary creature that has been secretly left in the place of a kidnapped human child. The apparent changeling could also be a stock, an enchanted piece of wood that would soon appear to grow sick and die.