In the canyon city of Oedolon, a twin sister and brother find their downtrodden life radically changed by an intriguing piece of technology tied closer to them than it appears. Challis Gannagen, accustomed to a life of sharing Rasalas' exquisite eyesight on top of her own in a bizarre double vision, rides thrikeback into a cosmic solarpunk adventure to discover the truth of the situation all along, and how the most unexpected people can be tripwires... just inviting her to walk right into danger.