sentences:  As Yvonne introduces Thomas to the London art underworld of Beatnik basement clubs and galleries the pair fall in love and form a meaningful relationship, whilst Thomas actually leads a double-life.Unknown to Thomas, he is being watched by Harris (Sean Chapman), a ruthless British Secret Intelligence Service officer, with links to Steiner, and answerable to Commander Bothringaye, a senior civil servant who runs an autonomous security department.They decide to apprehend Dennis as the supposed leader not only of the spy-cell but also of a planned coup, in collaboration with local Communist groups.