In Changeling, Christine Collins is a distraught, frightened mother. Her son goes missing, but even when he returns, all is not well. She doesn't believe the new boy is actually her offspring.
Christine Collins: Three boys tried to escape that night, and if one boy got away then maybe one or both of the other two escaped too. Maybe he's out there somewhere, afraid to tell the truth, afraid of what will happen to him or to me. But one thing I know is that boy gave me something I didn't have before. Detective Lester Ybarra: What's that? Christine Collins: Hope.