From the back of the book:

The Empire of Horas is known for its culture and knowledge, for sword duels and intrigues. It is more unusually that dark magic threatens the country, so much that the imperial family personally feels forced to take actions forced and that probably only the advice of the old dragon Shafir may promise help. Alas, everything has its price for a dragon ...
Shafir's oath (Shafirs Schwur) is the second and final part of the campaign of the ancient yaquirian crown sigil.