Before Dark wrestles with the moral implications of cochlear implants on the deaf community. The story follows a young couple hiking the Appalachian Trail when they get into an argument over their unborn child.
Both are deaf, Rebecca was born deaf while Joshua lost his hearing as a child. They argue over if their child should be given a cochlear implant if the child is born deaf. Both have opposing views on whether their child should be given the ability to hear or the gift of being deaf.
Joshua, who has a faint memory of sound, wants to provide their child with the ability to hear. Rebecca, opposes this by insisting that being deaf is not a disability, but rather a culture. There is no disadvantage for the child if born deaf in her opinion.
The film examines both point of views and challenges the viewers on who is right and if there is a morally correct answer.