Sam and Jay travel to where Sam's mother, Sheryl (Rachael Harris), died to see if she's now a ghost. Also, Sasappis divulges a secret to his fellow ghosts that he overheard Sam and Jay discussing.
When Jay's sister, Bela, comes to visit after a breakup, Sam is excited to help her through it with some girl time. However Bela arrives with news that spoils her plans.
While Sam and Jay prepare to host their first wedding, the contractor finds a hidden vault. Jay hopes to "Scrooge McDuck" into gold coins, Trevor tells the other ghosts about Al Capone's vault.
Sasappis offers to help Sam complete the bed and breakfast website so they can start taking reservations; Pete bonds with Jay over basketball, until Jay makes a new living friend; Flower attempts to be Pete's new basketball buddy.
As work begins on the guestrooms, the ghosts are forced to pair up. Thorfinn's roommate gets a shock on their first night, leading to Sam seeking a therapist who makes house calls.
Jay accidentally wakes the ghost in the attic, a teenager who usually sleeps in (only waking a few days a year), so she isn't happy to have been disturbed. Having died in prom night, the ghost wants to throw a ghost prom to make up for it.
Jay and Sam are ready to open their bed-and-breakfast, unleashing a horde of bored ghosts on unsuspecting guests. But Thor's pettiness comes back to bite them when a competing B&B reveals itself as the byproduct of a nasty Norse curse.
Sam enlists the ghosts to help secure a good review from an overly critical couple staying at the bed-and-breakfast; Isaac tries to integrate Nigel into his friend group.
Sam becomes alarmed when the ghosts suggest that Jay's new friends could be part of a cult run by a charismatic leader named Micah; Pete changes his attitude after Sasappis criticizes his unceasing cheerfulness.
Sam meets a new ghost at the Farnsbys' house with a connection to one of the Woodstone ghosts. Trevor puts his business skills to use leveling the playing financial playing field between the ghosts.
When Jay's sister Bela returns to Woodstone Mansion for a Christmas visit and brings a male friend, Samantha makes it her mission to spark a holiday romance between them.