Bankrupt mother Callie and her kids, Phoebe and Trevor, inherit Egon’s decaying Oklahoma farmhouse after his death. The town suffers from mysterious daily earthquakes. Phoebe, a tech prodigy, discovers Egon’s hidden lab, a working proton pack, and a ghost trap. Guided by her grandfather’s ghost, she realizes Egon isolated himself here to guard a major threat. Trevor restores the iconic Ecto-1, while Phoebe accidentally frees a ghost. The spirit flees to an old mine built by cultist Ivo Shandor, which acts as a gateway for the god Gozer. Ancient Terror Dogs soon possess Callie and local teacher Gary, using them to summon Gozer into the mortal world. The kids lure Gozer to the farmhouse, which Egon rigged with a massive subterranean grid of ghost traps. When Gozer overpowers them, original Ghostbusters Ray, Peter, and Winston arrive. Assisted by Egon’s spectral form, they cross proton streams, entrap Gozer, and save humanity. Egon shares a final goodbye with his family before fading away.