The Ghostbusters team regroup when the infant son of single mother Dana Barrett becomes the target of a demonic force. They must put a stop to an enormous underground river of slime ready to rot the roots of the Big Apple. "After waging a war on slime that cost New York City millions, the Ghostbusters find themselves out of business--until an ancient tyrant, preparing to return to the Earthly domain through his portal at the Manhattan Museum of Art,...