The Roughnecks are sent on a seemingly routine recon mission of the planet Tophet to determine if it can be used as a waystation for S.I.C.O.N. to the rest of the galaxy. There, the Roughnecks encounter an indigenous race of tall, thin iridescent humanoids known as Skinnies, who appear to be friendly. Finding no Bugs, the landing proceeds. Butsoon the Skinnies turn on the Roughnecks, revealing themselves to be allied with the Bugs. The Roughnecks must then battle against both their old and new foes in order to call off the landing before disaster occurs.