By the last 12th century, even the most remote parts of Sweden were bowing to Christianization. The ways of honor and freedom under the old gods were being supplanted, and those who still held them were increasingly required to submit to a foreign style of sovereignty and worship.
Rather than live in thrall to king and church, young Olav Larsson headed east to test his mettle and win valor among the Varangian Guard in Constantinople. Following common practice, he borrowed his initiation fee from the Byzantine treasury, and served loyally. After several years, however, it proved that even well-paid service to a Christian king could not sit well with him.
These seeds of dissatisfaction found root when he discovered a Nizari assassin who had become similarly disillusioned with her far flung mission to the Imperial City. Together, the two decamped from Byzantium to live by their own terms. Because she had abandoned her sacred order and he had fled his debt to the Empire, they took new names, Sirius and Achenar, after the stars that guide them. Navigating westward by the stars, the two adventures followed Vega to the Aratari and the Guard.