FBI Special Agent Olivia Dunham is assigned to the bureau's Fringe Division, in which she investigates unusual crimes and occurrences. Assisting Olivia in her investigations are once-institutionalised scientist Dr Walter Bishop, his jack-of-all-trades son, Peter, and FBI Junior Agent Astrid Farnsworth. As the team investigates cases of science gone awry, they discover connections to their own past and to a parallel universe. As the team explores life and solves cases in these interconnected worlds, new discoveries and complications continue to arise.