The Cloudkicker has fallen. After a daring escape from the hands of the Osiris Corporation, the relic hunting airship crash lands in the Sahara. Chased by Osiris at every turn, Alex Stirling and Captain Ghaoithe Loinsigh must stay one step ahead as they continue their search for Pandora's Box. Tied to it all is Ellie, the mysterious child linked to the relic who they must protect at any cost. Meanwhile, Osiris has plans of their own. Hiring a sniper known as the Desert Siren, they will stop at nothing to retrieve Ellie and put an end to the Cloudkicker's journey. In order to survive, Alex will not only be tested by Osiris and wild landscapes but her own questions about the Sky Thief...