Simulacrum and its opponents come to a peace treaty. The condition: Chor Tempest must be permanently disbanded. Meanwhile, Yun investigates the mystery of the Spring and Onasia.
As the war turns disastrously against Simulacrum, the mystery of the Emerald Ri Mājon is revealed, and the religious authorities have a special request for Aer and Neviril.
The funeral of a Simoun pilot brings high-ranking Simulacran officials aboard the Arcus Prima, and gives them an opportunity to try to micromanage Chor Tempest.
When Headquarters suspects that the enemy may be stealing helical motors from Simulacrum's holiest shrine, Chor Tempest is sent to investigate. They make an extremely surprising discove
Dominūra arrives to try to turn Chor Tempest around, starting with Limone. Limone has her first flight as an auriga and struggles with demons from her past.
Elly must choose whether to become male or female when she visits the Spring to choose her sex, and Aer tries to convince Neviril not to follow Elly into the Spring.