A wealthy man dies alone in his suite aboard the orbital resort of the ultra-rich. The station calls it heart failure and buries the story. His widow calls it murder, and offers ten million credits to prove it.

Adam Riker is broke enough to take the case, and smart enough not to go alone. He enlists twin sisters to follow him aboard: one with an implant that can hijack the station’s machines, one with a past in security.

They find discrepancies first. Then rooms on no map. Then someone notices.

By then it isn’t an investigation anymore. It’s a fight to get off Helios Crown before Argent Heavy Industries buries what they found — and everyone who found it.