Set in WW2 Guernsey it charts the occupation from collaboration, fraternisation etc which occurs in occupied countries. This is not an action series but a series about the lives of the Islanders.
Each episode is a self-contained drama unlike soaps which have several parallel plots running through each episode without conclusion. The main characters run throughout. The viewer gets to know them more deeply as the series progresses. Mostly, the stories are tragedy, with ordinary decent people sometimes being sent to horrific prisons or losing their lives. The Germans are portrayed sympathetically and individually, most of them trying to limit the damage to the locals and get through the war in one piece.
Every word is clearly enunciated, almost a stage delivery. At the risk of sounding old-fashioned, that is something you don't get in contemporary films where they mumble realistically but incomprehensibly. And the words are worth listening to - intelligent dialogue throughout.