Paranormal researcher Abby Yates and physicist Erin Gilbert are trying to prove that ghosts exist in modern society. When strange apparitions appear in Manhattan, Gilbert and Yates turn to engineer Jillian Holtzmann for help. Also joining the team is Patty Tolan, a lifelong New Yorker who knows the city inside and out. Armed with proton packs and plenty of attitude, the four women prepare for an epic battle as more than 1,000 mischievous ghouls descend on Times Square.
Although Harold Ramis passed away in 2014 and thus could not make a cameo alongside his fellow castmates, there is a bust of Ramis’ head just outside of Erin’s university office near the beginning of the film. The bust was later donated to the Harold Ramis Film School at Chicago’s Second City, where Ramis began his career.