Healing isn't linear-Tyler Lynn knows this saying all too well. Having been on the run from his destructive family for a month now, he finds the quiet, wintry atmosphere of Indra Academy unnerving. The dust seems to have settled after he and his friends escaped the magic realm of Derngate with their lives, but not all can remain still. Spirits under the school beckon the new Assembly of Six forward, whispering that their work isn't done yet.

Healing isn't linear-this is a saying Oliver Stylus cannot wrap his head around. Grappling with the reality of disability while trying to save the world has him torn every way, and he can only handle so much pressure. The past is returning to haunt him, literally, as a mission for the Assembly of Six leads him back to his home state California. Old faces and new creatures wait to greet him and his friends on the other side.

In search of the vital water and solar necklaces, everyone in the Assembly of Six must be prepared to confront the ghosts of their past. If they don't succeed, they might never be able to move on to the future.