 Donnan's crew, laboring on one of the Kandemirians' subject planets, are being carefully monitored to make sure they only work on the drive detection device.However, the monitoring of the material making up the chassis of the device is less stringent, and they are able to create a dummy copy of a common soldier's rifle from seemingly unrelated parts.With this they bluff their way out of confinement, capture real weapons, and eventually steal a starship.