This is not an easy watch and is pretty dark through most of the film. The Romans under Nero are on a rampage against the Christians and Paul is imprisoned throughout. I nearly gave up on it but I am glad I persevered. This is mainly because of the scene where Luke is preparing a group of imprisoned Christians to meet their death and I found that what he had to say could still be used by severely mistreated Christians today, for example those under persecution by so-called IS.
Theologically, the premise that Luke wrote Acts (his history of Paul's acts) at the point portrayed, rather than in the initial preperation of a defense for Paul's trial before Ceasar, i.e. at the point where the account ends with the statement, concerning Pauls presence in Rome up until that point, "Paul lived there two whole years in his own rented quarters and welcomed all who came to him, proclaiming the kingdom of God and teaching about the Lord Jesus Christ with complete boldness and without restriction." NET, Ac 28:30–31), seems unlikely. Having accepted that the makers choose to set the incidets when they did, the film looked like it might still provide some food for thought. Unfortunately, we soon found the characters tendancy to mumble lines, presumably for 'dramatic realism,' was distracting us from the content. As consequence we gave up on the film about half an hour or so in, but others might not find this so much of a problem.