A trip to Kissimmee, Florida, is no vacation for Supernanny Jo Frost as she finds the Fernandez family falling apart. Former high school sweethearts Jerald and Marla married young and now, years later, their relationship is in trouble. That's largely due to their inability to control their defiant 12-year-old daughter, Desiree, and two overly aggressive sons, Elias, 5, and Eulisis, 3. Mom's completely exhausted from trying to do it all, while Dad's frustrated and often unwilling to step up to the plate. Meanwhile, Desiree's developing a bad attitude and her grades are plummeting. And Elias and Eulisis are learning the wrong lessons -- that kicking, screaming and crying pay off to get what they want.