Neptune One: South. Neptune One: Case Files, #1

Neptune One: Case 1 - SouthA routine hostage rescue becomes the first thread in a conspiracy that could shake an entire space station. Neptune One was built to be humanity's future-a vast artificial habitat where millions live beneath an endless manufactured sky. But beneath its gleaming corridors lies a darker reality: forgotten veterans, hidden corruption, and secrets powerful people will kill to protect.
When Critical Incident Team leader Beth Baxter is called to a domestic siege, she expects another dangerous negotiation. Instead, she finds Grant Sanders, a former munitions officer suffering from severe PTSD, holding his girlfriend and her young son hostage. As Beth and her elite tactical team race against time to save innocent lives, it becomes clear Sanders isn't simply a desperate man pushed too far.
He knows something. While the crisis unfolds, Detective Mara Ellis uncovers a cryptic letter, an ancient key, and evidence linking the siege to a long-buried cover-up reaching into Neptune One's highest levels of security. Every clue draws her closer to a truth that powerful figures have spent years erasing. As two investigations collide, Beth and Mara must confront an enemy that hides behind authority itself.
In a world where information is manipulated, witnesses disappear, and justice comes at a price, exposing the truth may be more dangerous than keeping it hidden.