The Mothers centers on three young adults in the congregation of a black church in Southern California. Nadia has been away from home for years, having moved to Michigan to attend college, but her estranged father's heart attack brings her back to Oceanside. There she reconnects with Aubrey, her old BFF, and Luke, the young man who got her pregnant in high school. Aubrey and Luke are now happily married, and the former has no idea of what once existed between her husband and her friend.