Paul Parker is a hunter with a singular mission: to kill every grey squirrel in Northumberland. Unfortunately for Paul, he's outnumbered two million to one by the little Yankee bleeders. To licensed pest-control officer Paul, grey squirrels are recent immigrants. They came to Britain in the 1820s from America, and their population has been multiplying ever since. The main losers in the squirrel wars have been the British red squirrels, falling victim to a deadly squirrel plague whenever the greys move into their patch. It seems that Britain isn't big enough for the both of them.