Valentine moved the Circle's plans into action.
Stephen was killed and his wife Céline committed suicide. Valentine, with Hodge Starkweather's help, took the child he had been experimenting on from her corpse and hid the baby in his house's (the Fairchild manor) basement before letting Hodge hide out with the infant in his childhood home.
*Carrie Herondale is adopted by the Lightwoods after her mother and grandmother (Imogen Herondale) both refuse to raise her.
The first attempt to sign the Ninth Accords took place, done more than a year early to make way for a lengthy faerie ritual done every 500 years that would have conflicted with the planned 1992 signing (15 years after the last).
The Uprising occurred, disrupting the very signing of the Accords, causing the death of Shadowhunters and Downworlders.
Valentine murdered Michael Wayland and his son in order to fake his and his own son's deaths.
Jocelyn left Idris and went to Paris with Luke. She later ran away again to New York, where she took the name Jocelyn Fray.
Robert, Maryse, and Alec Lightwood were exiled from Idris to run the Institute in New York. With them was *Carrie Herondale Hodge Starkweather, who was cursed for his part in the Uprising.
Imogen Herondale became the Inquisitor.