Treachery is afoot on the 'Genesis', a cargo ship travelling at the very edge of Human space. When Sylvia Tanner opens herself up for 'a bit of honest corruption' with the Sontarans she soon finds she has bitten off more than she can chew. With a Sontaran aboard, and the sudden unexpected arrival of an investigator calling himself 'Alex', the stakes are suddenly raised even higher than before, and secrets will out. What is the Sontaran plan and why do they need the ship? Who is Alex and who is he working for? With time running short, Sylvia needs to unravel the mysteries fast, and then tell her enemies from her friends.