Blood may be thicker than water, but Jeff doesn't spare his sister-in-law/assistant, Sarah any slack. After a year of working with Jeff, Sarah still struggles with daily tasks and Jeff thinks a little tough love would go a long way, so he enlists her in his own Jeff Lewis version of assistant boot camp. Meanwhile, Jenni nearly brings down the roof, literally, at one of Jeff's most important clients.

After dealing with several client issues, Jeff realizes that his real bread and butter lies within his clients' happiness and he suddenly decides to focus on customer service and professionalism - two things that do not come easy to Jeff. With this new agenda in mind, he brings Trace and Sarah with him on a business trip, but before they go, they need to get to the bottom of a very concerning pet issue.

For the first time ever, Jeff Lewis Designs is taking on a restaurant - but not just any restaurant - the legendary Casa Vega. Already stressed out with such an important client, things take a turn for the worse when the owner decides to keep the restaurant open during the renovation. Meanwhile, Jett brings his newborn son Mason to work and Jeff and Zoila battle to be the best babysitter.