Shannon's good friend and retired tech billionaire Raphael Nash is loving his new retired life, but he can't stay unoccupied for too long. He's started the Marigold Foundation, which helps fund small companies and individuals who do humanitarian work around the world. It's an exciting time in Lighthouse Cove as Raphael hosts the first ever global conference, inviting big thinkers from every area of industry to give presentations on eco-living. Raphael's old business partner arrives in town with a grudge and a plan to steal him away from his important new passion project.

Shannon could not be happier that her hunky thriller-writing boyfriend, Mac, has moved in, and it is a good thing they are living together because they are both busier than ever. Mac is hosting writing retreats at his now vacant lighthouse mansion, while Shannon and her crew build Homefront, a quaint Victorian village of tiny homes for veterans in need. Mac’s latest guests are proving to be a handful, though, and Shannon has heard some grumbling from the luminaries of Lighthouse Cove about her latest passion project.

Chloe is the cohost of a popular home-repair show on the Home Builders Network. Now, after 10 years, she has returned to her quaint coastal hometown to film several shows featuring her sister, Shannon, along with some special mini-segments on Victorian style and design. But Shannon quickly realizes things are not exactly blissful in TV land. Bree, the executive producer of the show, has a knack for stirring up sticky situations, and when she’s found dead, Chloe and the entire crew are under suspicion.

At the annual Victorian Home and Garden Tour, Lighthouse Cove, California's premier contractor, Shannon Hammer, realizes that the competition is about to turn deadly.... Shannon is in high demand among rival homeowners who will do anything to win Best in Show. One-upmanship and even espionage break out among neighbors, construction crews, decorators, and landscapers. Thanks to several new hires, Shannon is sure she can handle the extra load - until murder throws a wrench in the works.

Even during the holidays, Shannon is more spackle than sparkle, which is why she leaps at the chance to transform a grand old Victorian mansion into 10 charming apartments for homeless families. Filled with the spirit of the season, all of Lighthouse Cove turns out to help - including her best friends, a troupe of far-from-angelic Santa Claus impersonators, and her father, Jack. But their merriment is soon dashed by a heated scuffle between Jack and the miserly president of the bank who's backing the project.