It's a Dutch movie about the Dutch naval admiral Michiel de Ruyter, focusing mainly on the Dutch-Anglo war during the 17th century. It had a budget of 8 million euros which, for Dutch standards, is pretty high. The movie shows some pretty epic naval battles with decent special effects. Keep in mind that this is a Dutch production with a budget similar to a single Game of Thrones episode so if you can look beyond the sometimes cheesy CGI, it's pretty spectacular.
The acting is decent (although IMO hampered by the fact that most roles are performed by the very small group of capable Dutch actors. Faces are too familiar, but a problem not experienced by non-dutchies) but it's telling that Charles Dance (probably best known now for portraying Tywin Lannister in GoT), who plays English King Charles II delivers the best performance by far.
If you have 2 hours to spare it's a movie worth watching IMO. Naval battles arr always cool and this movie doesn't cut corners by making it take place entirely in the dark (looking at you GoT S07E02
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