After a long vacation, Amy wants the family to give something back. She and the kids head to Biloxi, Mississippi where they learn firsthand how much work is still left to be done as they help build new houses and repair one damaged in the storm.
With their riverboat cruise finished, Matt heads home, leaving Amy in charge for the final days of the Roloff summer vacation. She does her best to keep the kids happy on their road trip through the South to New Orleans.
Family friend Mike Detjen is as involved with the Roloff family as ever: building a new trebuchet, coaching the twin's soccer team. When a heart condition suddenly takes Mike's life, the family must face coping with the loss of their friend.
Now that three out of their four kids are out of the house, Matt and Amy Roloff seek out new challenges. Amy leaves her comfort zone to attempt a climb up Mount St. Helens, while Matt builds a new one-room schoolhouse for the farm.
After months of renovation, the Roloffs are remodel-weary - especially now that it's winter. But when Matt decides to "go green" and install a gigantic geothermal heat pump system, the whole family chips in to warm up their house again.
While Amy is busy juggling her kids' events, working 2 jobs, and doing her chores at home, she is suddenly taxed with finding host families for three visiting soccer coaches. Meanwhile, Matt impulsively decides to clean the house from top to bottom.
Zach and Jeremy have reached adulthood-sort of. They're 18, but they don't seem ready to leave the nest. Amy prepares a pool party for the twins, but when Matt drags his feet on getting the pool in working order, the whole party is put in jeopardy.
Amy and Matt's families gather for the twins' pre-graduation party. Jeremy surprises everyone by making the honor roll -- but when Zach's report card includes a failing grade, no one knows whether he'll even be getting his diploma.
Inspired by his artistic uncle Sam Roloff, Jeremy experiments with becoming a photographer. Meanwhile, Molly may have bitten off more than she can chew when she tries to balance schoolwork, a job, a college search, and running a marathon.
When Matt Roloff learns of dwarf children in Iraq who need medical intervention, he makes the difficult, dangerous journey into Baghdad to find the family, befriend them, and get photos and x-rays to bring back to America for evaluation.