Ghostbusters: What in Samhain Just Happened?

When a media mogul seeks out the Ghostbusters to fix his haunted mansion, the guys decline, assuming it's a Halloween-themed publicity stunt. However, Janine, angry about her pay, takes the job, claiming she knows as much about ghostbusting as the guys do. She's soon in over her head, and the Ghostbusters have to race against time to save her before she's yanked over to the other side forever.