The plot revolves around the ugly, smelly, disgusting yet ingenious couple who enjoy playing nasty tricks on one another. They amuse themselves training their pet monkeys harshly to be part of their dream upside down Monkey Circus. Moreover, their mouth always waters at the thought of catching birds to stuff them in a Bird Pie which they love so much. In order to achieve this goal, they continuously scheme together to be able to trap the birds. Will their plan materialise? Will the monkeys be doomed to an undignified lifetime of performing tricks upside down? Will anyone come to rescue them from The Twits?