Five months after the events of Luz's 'Kingceañera', the short-lived peace is disrupted by a new cosmic threat, The Archivists, siblings of The Collector. Who have the desire to uphold a prophecy that may threaten everything in existence. Now it's up to Luz Noceda to enter the Realm of Cosmic Space to stop them.

Two months after Into The Cosmos, Luz, King, and Atlas aka The Collector reel from the impact of the events that had transpired. Now they're tasked with keeping the Celestine Compass hidden away from the Archivist's Grasp. However, they must contend with the fact that they're being hunted down by a being known as, The Grand Huntsman.

With Luz and King gone to the stars, Eda Clawthorne must lead the University of Wild Magic while keeping the Boiling Isles steady. Joined by Raine, she struggles with change, leadership, and the quiet ache of an empty nest. Small cosmic signs hint that peace may be short-lived.

With tensions between Humans and Witches running high since the introduction of the Human-Demon Exchange Program; Gus, Willow, Vee, and their friends launch a bold effort to rebuild trust between the realms. Although, as cultural clashes, political resistance, and hidden agendas threaten to unravel their efforts, the group uncovers clues linking recent unrest to a growing conspiracy.