After a long war between the San'Shyuum and the Sangheili, the two species finally formed an alliance, creating the Covenant. A group of Sangheili, however, did not agree with this alliance and fled to a hidden Forerunner shield world known as the Refuge to continue their community outside of Covenant influence. Their newfound peace did not last long, however, as Covenant forces followed them and forced the new colony into isolation.
Aside from the Refuge, High Charity and Janjur Qom serve as the settings for Broken Circle.
Broken Circle takes place partially on High Charity, including the Forerunner keyship at its heart, Anodyne Spirit.