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.

It's been over 2 years since both Matt and Amy's families got together, so they invite the Knights and the Roloffs to the farm for an early holiday celebration. Amy attempts to deck the halls and transform their home into a "Roloff Winterland".