Valaquenta begins with a short summary of Ainulindalë. It then goes on to introduce the Lords and the Queens of the Valar, giving a bit of background information on each of them and explaining how they relate to one another.
Next, we are introduced to the Maiar, spirits similar to the Valar but of a less degree. The last section is titled 'Of the Enemies' and explains a bit more about the cruelty of Melkor as well as introducing his servant Sauron.