Story number one: an old lady and a young man, both living in Patagonia, secretly go to Wales (against the young man's wishes) to trace her heritage.
Story number two: a Welsh speaking couple travel through Patagonia on a work assignment (the guy is a photographer). Their relationship is approaching a crisis or two.
The first story has a sense of humour and feels a bit like a sightseeing tour of Wales, ticking various boxes of "famous things about Wales" along the way. The second story is less funny. Both stories are entirely indie-infused in tone and could easily be shown at Sundance. Everything about the film is achingly Indie - the soundtrack, the sense of humour, the sensibilities.
It is also infused with Welsh patriotism, mellowed a bit by a self-deprecating sense of humour. This is a movie that tries to answer the question: what does it mean to be Welsh? What is different about Wales from other places? Who are the Welsh? It spends so much time and effort on this that this becomes impossible to ignore. You can almost imagine the film-makers saying something like "we wanted Wales to be a character in this film, not just a setting". I don't love Wales, not as a place and not as a character, so the movie was barking up the wrong tree in that regard.
The end result is a film that has echoes of the familiar. It probably resonates with Welsh people more than anyone else (it does not feel universal at all - it is so fiercely local that I can't imagine what my reaction would have been like if I did not live in Wales). It entertains, in a mellow kind of way, and entices the odd chuckle. But it never really builds up energy or excitement. It's watchable, indie, and, if it weren't set in lots of familiar places, bog-standard, by-the-numbers stuff.