
Wikipedia
Five years after the Ghostbusters have saved New York, they are out of
business because they have been sued for damage to the city. When Dana's child
is the victim of a paranormal event, she asks the former Ghostbusters to
investigate. They find a river of slime in the old underground tunnels, and
the substance seems to react to human emotions. They are sued again after the
investigation for drilling a hole in the middle of 1st Avenue, but as ghosts
appear during the trial, the judge has to admit that ghosts exist. The
Ghostbusters are back in business. In the meanwhile, Dana works at restoring
paintings in the museum, where her boss Janosz is being manipulated by the
ghost of Vigo, an Carpathian ruler from the 16th century, through the painting
of the man. Vigo commands Janosz to bring him Dana's baby so that he can be
corporeal again and rule the world. When the Ghostbusters discover that a
major event is going to happen, they try to warn the mayor, but are sent to a
psychiatric hospital by his assistant, and Dana's baby is kidnapped by a
ghost nanny. When the museum is getting covered in slime and ghosts wreak
havoc in the city, the Ghostbusters are asked for their help, but they cannot
break the layer of slime around the museum, which is reinforced by all the
negative emotion in the city. They need a symbol of hope for the population,
so they slime the Statue of Liberty and animate it with music. With it and
with the positive emotion from the city's population, they manage to enter the
museum, save the baby and defeat Vigo.