A cat-and-mouse game across the skies.

A summoned apocalypse.

The fate of the world hangs in the balance.

June, 1929 finds the Daedalus crew in the Peruvian mountains, working with an old comrade to retrieve a sacred artifact stolen from a native tribe.

Handed one last mission by Edison himself, "Captain Stratosphere" Jack McGraw, Dorothy "Doc" Starr, and the rest of the crew head to Seattle, where an aerospace innovator will re-fit the Daedalus with a weapon system for testing off the coast of British Columbia.

But the routine mission becomes a perilous fight for survival, both on the ground and in the air. For Aleister Crowley and Maria Blutig have summoned a storm which threatens to open an eldritch dimension, ending the world as we know it.

Can a haggard and wounded crew fight a war on two fronts, while a secret strike team raids Crowley's lair, in the desperate hope of staving off the apocalypse?