Still on the heels of the Devourer cult, the heroes head to a distant, uncharted star system, where they find the ruins of an ancient alien city floating in the atmosphere of a gas giant. Exploring the ruins, they encounter the degenerate descendants of a highly advanced species that once controlled the alien superweapon the heroes are searching for. Through the legends and superstitions of these savage aliens, the heroes can piece together clues to the superweapon's hidden location and the key to unlocking its power—an impossibly huge megastructure that the Cult of the Devourer is intent on seizing!

"The Ruined Clouds" is a Starfinder Roleplaying Game adventure for 7th-level characters. The adventure continues the Dead Suns Adventure Path, a campaign in which players explore the secrets of the galaxy as members of the Starfinder Society. It also includes a gazetteer of the ruined alien city of Istamak, an exploration of the hyperspace plane called the Drift and the mysterious city at the center of it, and a selection of new monsters from alien worlds.