The Pembertons pack up their home in not-so-sunny Yorkshire and head for Florida and the promise of beautiful weather at the Kissimmee Sunshine Park. What dad Mal discovers upon their arrival is ... not quite as he'd expected.

The park's septic tank explodes and Mal and Jen are forced to turn to the only sewage expert around: Mayor Herman Bloch, the eccentric father of Tina's new boyfriend. Meanwhile, Freddie struggles to find his place at school, and Conan looks to take his and Tina's relationship to a whole new level... and it's not one Tina was expecting.