Talia Inger is a rookie CIA case officer assigned not to the Moscow desk as she had hoped but to the forgotten backwaters of Eastern Europe - a department only known as 'Other.' When she is tasked with helping a young, charming Moldovan executive secure his designs for a revolutionary defence technology, she figures she'll be back in DC within a few days. But that's before she knows where the designs are stored - and who's after them. With her shady civilian partner, Adam Tyler, Talia takes a deep dive into a world where criminal minds and unlikely strategies compete for access to the Gryphon, a high-altitude data vault that hovers in the mesosphere. But is Tyler actually helping her? Or is he using her for his own dark purposes?