Twin sisters Heather Fujikawa and Heidi Andrews, along with their husbands and seven kids, come together under one roof to start an interior design business; Heather and Heidi design a bedroom for some special clients.

Heather and Heidi take on designing a playroom for their first official design project; Heidi and Paul go on a dinner date to celebrate their anniversary, while Heather and Tyson watch all seven kids alone for the first time.

Heather and Heidi are in full design mode as they redesign Tyson's home office to serve as the Joyful Living headquarters.

While designing a dining space for a family of six, Heather and Heidi learn that balancing motherhood and work is a bigger task than they expected.

As the business grows, Heather and Heidi receive an amazing opportunity to design a hotel; however, they have different design ideas and decide to present competing design boards to snag the project.

Heather and Heidi design a living room and dining space for a family of seven; Tyson longs for the days before the Andrews moved in and decides to have a house meeting.