This is a movie about William Moulton Marston, the psychologist who created Wonder Woman, and the two women he made an unconventional family with. Spoiler: Marston, was married to Elizabeth, but later started a relationship with a student, Olive Byrne. Eventually they all lived together and both women had children fathered by Marston. They were all raging feminists.
I have to confess, I would have liked the movie a lot more if I hadn’t already read the definitive biography of the family, The Secret History of Wonder Woman, by Jill Lepore. To be fair, the movie isn’t based on the book, which isn’t at all mentioned in the credits. So I can’t really complain. But the movie basically took these people who really did exist and really did invent Wonder Woman, and used them to tell an entirely different story, a more conventional romance narrative, that isn’t at all accurate to what really happened, based on what I read in the book. I got annoyed. But people who hadn’t read the book first liked it just fine.
In my own opinion, the book is way more interesting. Read it.