Blood of His Blood is the final main quest of the Prologue in The Witcher 2: Assassins of Kings. With the inner courtyard taken, Geralt escorts King Foltest through the monastery temple toward the solar, where the king hopes to find his children, Boussy and Anais.
First comes a tense chat in the church with the Archpriest and Tailles, where a little Axii goes a long way toward learning where the children are hidden. On the bridge to the solar the dragon returns for another go, and Geralt has to get the king through a quick-time gauntlet that ends with a silver sword in the beast’s mouth.
Foltest does reach his children, but a man dressed as a monk strikes him down and escapes through a window into the river. Geralt is too far away to stop it, and the knights who burst in find him standing over the king’s body. That is how a royal bodyguard ends up as the prime suspect.
