Let me start by saying this book is phenomenal, it has been quit some time since I read a debut novel this strong. 

It is the story of life on a cotton plantation in Mississippi. The book switches perspective in each chapter, from both the enslaved people and the plantation owners, aswell as some chapters told from past tribes in Africa and greek chorus style chapters from the ancestors. All these voices however, pivot around two men in love, Samuel and Isaiah. The book is about their relationship and how they find love and comfort in eachother whilest tensions on the plantation reach a crescendo. 
This isn't an easy book. One, for its subject matter. It comes with the content warnings you might expect from a book dealing with slavery. But it also isn't a straightforward story. It switches around from different perspectives, it jumps back and forth in time, and the writing, whilest beautiful and lyrical, also uses a lot of similes and metaphors. It's a book that takes a bit more effort and concentration to read in my opinion, but I promise it pays off. 
It is a weighted book, weighted with history and wisdom and trauma and sadness of generations of enslaved people. And at the same time it has notes of lightness and love and hope in the story of Samuel and Isaiah. Painful and soothing at the same time. 
There is so many layers to unpack in this story, I feel like I've only scratched the surface in my first read, so I have an inkling I will be returning to this book in the future.