Medium follows the life of Allison DuBois, a suburban mother and law student who begins to realize that her lifelong ability to communicate with the dead and see visions of past and future crimes is not a curse, but a gift. Struggling to balance her domestic life with her husband Joe and their three daughters, Allison eventually begins working as a consultant for the Phoenix District Attorney's office, using her psychic insights to help solve complex murder cases that have baffled local law enforcement. As the series progresses, Allison faces the constant challenge of proving the validity of her visions to skeptical colleagues, particularly District Attorney Devalos and Detective Lee Scanlon. The show explores the moral and emotional toll of her work, the strain it places on her marriage, and the terrifying realization that her daughters may have inherited her supernatural abilities. The series blends procedural crime drama with supernatural mystery, focusing on the intersection of justice, family, and the paranormal.