The main character of the book, Frank Owen, seeks over and over again to win his fellow workers to the socialist cause, most famously with the 'money trick', perhaps the best, certainly the most entertaining, explanation of Marx's theory of surplus value! Owen doesn't always win the argument but he never gives up believing in "the Golden Light that will be diffused throughout all the happy world from the rays of the risen sun of Socialism."
Check out this event in Hastings on Saturday.
You cannot underestimate the influence of Ragged Trousered Philanthropists on British socialism.
Obtain, read and enjoy (and the teeshirt and the mug as well).