Pete's widow, Carol, shows up at Woodstone Mansion during Sam and Jay's Halloween party, where they're trying to impress some cool friends; the ghosts hope to bring Flower back with a seance.
When Sam and Jay leave the ghosts home alone for the weekend in an attempt to have a romantic getaway, shocking revelations are made about two of Woodstone's beloved spirits.
Pete gets a visit from his living wife only to discover she's hiding a secret from him; Sasappis gets angry when Thorfinn binge-watches their favorite show without him; Trevor learns he may have a daughter.
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.
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.
Sam and Jay's assistant Freddie purchases ghost-hunting equipment when he becomes convinced by suspicious activity that the B&B is haunted; Freddie selling his car could mean the end of things between Sasappis and Jessica.