In a review titled 'Victorian View of Empire', The Times provided this summary of the plot:
Mrs. Sweeney has an absent son busy prosecuting the course of Irish unity by blowing up bridges in his native land; she has also three lodgers, an Indian, an African student eager for the sake of his political future to reach an English prison, and a young pole [sic] who takes seriously the doctrines of an anarchist orator at Speakers' Corner and attempts to blow up the Home Secretary with a ridiculously inefficient home-made bomb. No harm is done, and English tolerance and humour (displayed by an Irish policeman) make all well.
Source:
'Victorian View of Empire', The Times, 1 July 1963, p.14.