Dr. Peter Venkman, Dr. Ray Stantz, Dr. Egon Spengler and Winston Zeddemore are four Ghostbusters who are part detectives and exterminators who chases ghosts who terrorize the city and the people of New York. It's up to them to stop them. Ghostbusters business started out with Dr. Peter Venkman, Dr Ray Stanz and Egon Spengler who were ex university research scientist who were fired from Columbia University.
Before they were fired, they encountered their first ghost in the New York Public Library and decided to start their own business called Ghostbusters. They set up shop in an abandoned firehouse and start renovating it and they became instant celebrities overnight with they caught their first ghost Slimer. They created a proton packs and a ghost trap that helps them catch ghost. Winston Zeddemore an ex-construction worker joined the team. After that Ghostbusters mania was born.