The Park family are in the airport on their way home from Hawaii when their flight is delayed for several hours. Ken has an interaction with Dr. Oz that goes awry - and then needs to get the famous TV doctor to switch airplane seats with him. Meanwhile, Allison gets overly involved in Molly's love life and accidentally breaks up with her boyfriend via text message, and Dave finds himself in a high-stakes card game with some college students. Back at Welltopia, it's "Black Monday," the clinic's busiest day of the year, and in Ken's absence, Julie is the doctor in charge, and Clark and Damona have to help her learn that thoroughness doesn't have to take forever.

After Ken's dad arrives for an impromptu stay, he starts taking on chores that Ken hasn't gotten around to doing -- like buying and installing a much needed new dishwasher, but then Ken purposefully breaks it. Meanwhile, Damona and Pat hook-up after a drunken night together. But instead of clinging to Damona the next day, Pat makes an announcement that takes Damona by complete surprise.