Luther 'Hobbo' Hobdyke, a retired milkman with strong links to MI5, arrives in the village. Very soon, calling upon his experiences on numerous dangerous missions overseas as a master spy, he forms a small team of reluctant volunteers, consisting of Alvin and Entwistle, ready to react to any emergency in the village. Finding that Hobbo has moved in next door, Clegg and Truly recall that he was never much of a milkman, but have to admit that his needlework is always exemplary.