In a quiet, unsuspecting town, strange and supernatural phenomena begin to unfold – a chilling presence envelops the area, leading to freezing temperatures and eerie occurrences. This prompts Trevor, Phoebe, and their family to look deeper into the history of their new home, discovering it is built on a former hotbed of paranormal activity linked to an ancient, powerful entity. Realizing they are in over their heads, they enlist the help of the Ghostbusters, now seasoned experts in handling otherworldly threats, to uncover the source of these disturbances.

Together, they trace the ice-cold hauntings back to a mysterious old artifact that has unleashed a primordial force capable of freezing entire landscapes. As they piece together clues and confront spectral apparitions, they race against time to stop this ancient power from plunging their world into eternal winter. The team must use every tool and bit of knowledge at their disposal, battling both the specters and the creeping ice, while unlocking buried truths about the original ghostbusting adventures. The gripping journey tests their courage and teamwork, leading to a climactic battle that will determine the fate of their town and beyond.