In Atlantics, Mati Diop relies on several genres that don't immediately seem to fit together. It begins with a love story of young people in modern Senegal, places those people within the specific problems of Senegal, deals with family disagreements, and then turns into something all together different. It's not seamless, but I don't think that is Diop's intention. She goes with what she thinks works, and leaves the audience to follow her instinctively. I admit to being confused at times, but I was always intrigued, and by the end of the movie, everything fit together.
Atlantics is the debut feature from Diop, who had directed shorts and had also acted (35 Shots of Rum). Her command of the interplay between genres is excellent ... perhaps even more impressive is the performances she gets from her cast, some of whom were appearing in their first movies. This is especially true of the lead, Mame Bineta Sane, who had never acted in anything before (and I can't find anything she's been in since). She is the center of the film, and she's wonderful, complex, photogenic ... I'd say this was a star-making performance except she doesn't seem to have done any work in films since.
I'm being a bit vague on how the narrative turns. It's best if you come to the movie cold, as I did. That contributes to some of the confusion, but it's worth the surprises it entail. #116 on the They Shoot Pictures, Don't They list of the top 1000 films of the 21st century (#917 on the All-Time list).