Deadline has the official synopsis: “The story follows Moiraine, a member of the shadowy and influential all-female organization called the ‘Aes Sedai’ as she embarks on a dangerous, world-spanning journey with five young men and women. Moiraine believes one of them might be the reincarnation of an incredibly powerful individual, whom prophecies say will either save humanity or destroy it.” This description falls more or less in line with the plot of the first book, “The Eye of the World,” though judging by the first trailer, we’re going to be seeing quite a bit of action that happens off-page in the books, and even meeting a few characters that don’t factor in until later.
In the books, the incredibly powerful individual spoken about is referred to as the Dragon Reborn. While the identity of the Dragon Reborn is revealed at the end of the first novel, it’s unclear if Amazon’s show will go in this direction or subvert expectations and change things up for its adaptation. While any such change may disappoint fans of the books, it certainly wouldn’t be the first time that an adaptation wasn’t completely faithful to the source material.
Either way, all fans can do right now is speculate until Season 1 drops.