Now empty-nesters, Cassie and Sam celebrate their first wedding anniversary. Abigail and Donovan’s relationship continues to be challenged by their families’ curse. Cassie’s Grey House guest has intentions for visiting Middleton that are different than she claims.

Cassie, Abigail and Joy browse an estate sale, where Joy hopes to find a clock for Martha's renovation. Stephanie's ex-husband, Wes, comes to town to pack up their shared cabin.

Martha fills in as the local Dear Debbie advice columnist, getting an anonymous letter that adds intrigue to a progressive dinner attended by all of the Middleton couples.

Cassie pursues a temporary art history professorship while Sam diagnoses Adam. Abigail and Donovan realize that the missing diamond from the Middleton treasure may help break the curse.

Cassie gives her art history students a lesson on perspective. Sam performs surgery on Adam, who worries about his recovery. Joy’s troubling dream about Abigail and Donovan may not be what it seems. Martha courts a French delegation to secure Middleton’s status as its sister city.

As Cassie gets ready for Grey House’s 225th birthday Martha leads the group in a tableau vivant recreating a Nathaniel Merriwick painting, leading to new clues surrounding the Merriwick-Davenport curse. Joy experiences life differently when her intuition suddenly takes a holiday.

Cassie welcomes a chocolate festival to Grey House where the confection has a special, sweet effect. Sam and Donovan discover a new clue surrounding the Merriwick-Davenport curse, while now-single Abigail gets an unexpected visit from a college friend for a surprising reason.

When Cassie and Sam’s weekend in Chicago gets canceled because Sam has to stay behind for work, she and her book club friends hit the road instead. While the ladies recharge the weekend also comes with surprises, including a potential clue about the Merriwick-Davenport curse.

Cassie’s teaching position winds down and Sam is forced to take vacation time so they try out different hobbies together. Joy’s faced with a decision when Donna accepts a job for them in Vermont. Abigail and Donovan make one last stand against the curse.