Abby and Erin have been friends for years. From their first high school science fair project, 'The Durable but not Impenetrable Barrier,' to their first book, 'Ghosts from Our Past: Both Literally and Figuratively: The Study of the Paranormal,' and now as part of a new Ghostbusters team, they have always worked well together. But with new teammates - Holtzmann and Patty - in the mix, can they work together to form a whole new dream team? They'll discover that, together, there's no ghost these buddies can't bust.