The ad, created by Karmarama, features established brand character 'Joe', played by stand-up comedian, Craig Murray, walking across Ilkley Moor in Yorkshire, delivering a manifesto about the quality and pricing of Plusnet's broadband.
The ending shows a huge dog painted on the side of a hill, with the strapline, "Plusnet – We'll do you proud!", painted beneath it.
The ad broke on Saturday (26 May) on ITV London and will run on the channel until mid-July.
Nick Rawlings, commercial and marketing director at Plusnet, said: "It's key that we demonstrate that a lower price doesn't mean a lower quality of service or product."
In April, Plusnet dropped its "Good honest, broadband from Yorkshire" strapline, which it had used since it first advertised on TV in 2010.
Follow Sarah Shearman on Twitter @Shearmans