After an emotional reckoning, the Squad—alongside a determined Brunner—makes a bold decision: They will return to their dream world, Ethra, and attempt to save their best friend before she's taken off of life support. On their path towards salvation, the Squad begins to suspect that the world they thought was a figment of their imagination might be far more real—and far more dangerous—than they ever realized.

With time running out on Earth, the Squad reenters Ethra, bringing Brunner along for his first journey into the unknown. In this world where magick flows freely, fantastical creatures roam, and a darkness has festered in their absence, they face a harrowing choice: Save Jhoana or risk falling victim to the same horrifying fate.

In the final installment of Superstring, step into the realm of Ethra—a world as wondrous as it is perilous. As the clock ticks down, who will make it back alive? And can they save their friend before it's too late?