The Season 4 premiere picks up immediately after Isaac was dragged into the "dirt" by a mysterious spirit.
If you're looking for a summary or details about Season 4, Episode 1, I recommend checking a reliable TV show database or the show's official social media channels. ghosts s04e01 satrip
The B-plot: tries to cook a “historic Lenape meal” for Sam’s blog, but the ghosts keep “helping” — Alberta’s seasoning tips, Pete’s safety warnings, and Crash losing his head over a knife technique. The Season 4 premiere picks up immediately after