While trying to find out what happened to Lt. Ross, who was found wandering on Hydora with his memory gone and his entire squad missing, the Roughnecks are captured by the Bugs.

All S.I.C.O.N. forces revert to peace status after the Bug Queen has apparently been destroyed. Carl, though, keeps insisting the Queen is still very much alive and on the earth - somewhere. After another argument General Redwing sends him on leave to cool down. Meanwhile the roughnecks are reassigned - to the moons of Jupiter to repair the radio telescopes. Rico believes Carl is right and manages to convince Lt Razak too. Razak cuts through the red tape and gets Gossard to review satellite imagery of the earth before and after the Queens assumed arrival. Gossard finds an new, unexplained, hot spot near to Little Butte, North Dakota.

The roughnecks divert their shuttle there without formal authorization but the town seems to be normal - until they realize the towns- people all look alike and sound alike. A s soon as they realize this they are attacked by the residents. The Roughnecks manage to capture a resident and get back to the ship. As they take off the r

The S.I.C.O.N. Fleet is hunting for the Bug Queen, after she escaped in a Transport Bug from Klendathu.

Whilst in transit the Roughnecks get a mail delivery and find out Higgins had a girlfriend they weren't aware of who had just dumped him. The Roughnecks get annoyed that, whilst Higgins has the info. on them, they are ignorant about him. The Valley Forge intercepts what seems to be the Transport Bug the Queen is in and destroys it.

As they make their report the same thing is received from the other fleet vessels. Carl twigs that the destroyed bugs were just decoys to distract the fleet whilst the Queen heads toward Earth. Due to Carls psychic abilities the Valley Forge is able to intercept the Queens Transport Bug. But the Bug seems resistant to all the ships weapons. 2The Roughnecks are sent into blow the Bug from the inside. They only have 48 hours before it reaches the Earth. Despite heavy resistance inside the Transport Bug they apparently achieve their missi