At Signy's wedding to King Siggeir, Sigmund offends his new brother-in-law. This triggers a series of revenge killings, beginning with Siggeir luring King Volsung and his sons into a trap. Volsung is killed, and his sons put in stocks. Over the course of several nights, all of his sons save Sigmund are killed by a she-wolf. He is saved by his sister Signy, who then helps Sigmund make a hiding place in the woods. As time goes on, Signy has two sons by Siggeir. She sends her boys to Sigmund to help him avenge the death of the Volsungs. However, both boys fail to pass a test of bravery and are killed by their uncle Sigmund at their mother's insistence, as she deems them unfit for vengeance. Signy then tricks her brother Sigmund into sleeping with her, and their son Sinfjotli (who has nothing but Volsung blood) becomes a powerful man raised with only one purpose: to avenge his uncles and grandfather. Eventually Sigmund and Sinfjotli manage to kill Siggeir, and after this Sigmund returns to his own country, retakes his father's throne, and rules there for many years.