Mike is going back to his roots and helping families, along with his kids, Michael and Sherry. At a home they dub The City Barn, they plan to fix the weathered roof and make the property more accessible for a 13-year-old who is battling cancer. When the reno is delayed because of structural issues, the Holmes team begins a second job at The Flood House and uncovers how a little leak turned into a nightmare for the homeowners.

Structural issues at their two clients' houses means Mike and Michael must split up and tackle the jobs separately. Michael takes on the roof and other problems at The City Barn, while Mike uncovers unsettling complications when taking down a load-bearing wall at The Flood House. Later, Sherry meets with two apprentices to add to the crew.

The Flood House is close to completion, and the showpiece gas fireplace with a custom mantel brings one of the homeowners to tears; more structural issues arise at The City Barn, creating greater challenges than Mike and the team expected.

Mike and the team begin a third project and declare it The Toxic Townhouse after a home inspection uncovers terrible toxic elements and a dangerous pipe issue; then, the team makes another disturbing discovery at The City Barn.

Police are called to investigate after Michael makes a startling discovery at The City Barn. Then, Mike reveals all the Toxic Townhouse's issues to its owners, and the family's newest addition is introduced to the crew.

Mike and the team install a new furnace at The Toxic Townhouse, replacing the decade-old gas fireplace the homeowners were using to heat the home; The City Barn owners are welcomed home with a reveal that takes their breath away.

Mike and the crew start a new home that was left half-finished by a contractor, and they find problems behind the walls; Michael and designer Kimm go shopping for flooring with some furry friends; Sherry and Cali take baby steps getting to work.

Mike takes the homeowners through The Half Done House to reveal all of the issues discovered during demolition; Michael and Derek make a sound diffusion board for a music room and prepare to return a healthy home to its owners.

Mike meets a woman who needs help tackling projects that have accumulated since her husband passed away 10 years ago; at The Half Done House, Sherry teaches the apprentices as they frame out a show-stopping fireplace.

Mike shocks the owner of The Twice Done House after discovering mold in her attic; the exterior of The Half Done House gets a major facelift, while Sherry and designer Kimm shop for quartz for the bathroom and fireplace.

The Twice Done House's troublesome fence, windows and caulking are done right for the first time, and Michael brings the homeowner over to show her the progress; The Half Done House becomes the Fully Done House and the family is welcomed home.

Work continues on the Twice Done House as the crew finishes installing the flooring and the kitchen; Mike must take care of a health issue, leaving Sherry and Michael to put finishing touches on the renovation.