Nattie and Kiko are on a Mission - like all flies since the beginning of time, their job is to keep their allocated humans exercised and help them recycle their food. But now Nattie and Kiko have a problem - they have been sent to 43 Bin Street, and the new occupants are obsessively clean - they never leave any food lying around and even use fly spray! How can Nattie and Kiko fulfil their fly destiny and obey the teachings of the Flyrule in a house like this? 43 Bin Street succeeds in doing for flies what Richard Adams did for rabbits in Watership Down.