It was a fairly realistic strip about an eponymous contemporary British schoolboy, set in the fictional town of Westhaven-on-Sea.
Dartmouth Castle is shown in the first ever instalment of the story in Ranger, dated 18 September 1965.
An amalgamation of Dartmouth and Kingswear can clearly be seen in the bottom panel of the first page instalment of Rob Riley appearing in "Ranger", dated 20 November 1965.
The story follows Rob from adolescence as he begins secondary school through to adulthood, by which time he is employed as a Private Detective.
At one point he obtained a scholarship to a public school, the strip dealt with the social issues this raised.