Jessie's stepsister Darla comes to visit, and Jessie enlists Tony's help to try to cover up the fact she didn't go through with the wedding. Meanwhile, Luke shaves for the first time and when Bertram comes to help, things get a bit hairy.
Jessie finds herself in unfamiliar territory when Emma's unexpected behavior gets her into trouble at school. Meanwhile, Luke takes on the role of Sensei to train Zuri for her upcoming karate belt test.
Eager to play in Luke's basketball game, Ravi unexpectedly runs into LA Clippers star Chris Paul, who he enlists to coach him. Meanwhile, Jessie learns that Hudson is her new classmate and is unhappily forced to partner with him for an assignment.
While on vacation, the Ross family finds a girl stranded in the middle of the ocean and invites her aboard their yacht. Meanwhile, Bertram stays home and babysits Mrs. Kipling, who has separation anxiety from Ravi.
In the final part of the "Rossed at Sea" three-parter, Jessie abruptly ends the Ross family vacation because the kids are constantly fighting. They wind up in a pickle when they find the yacht the next morning floating in the middle of the sea with no captain or crew in sight.
When Luke becomes the brain of the family and Zuri the new trendy fashions, Ravi and Emma feel their identities have been stolen. Meanwhile, Bertram wonders what might be behind the only door in the penthouse he hasn't opened.