In this conclusion to the second cycle, Kim, Inge, Mai Lan and Hector have been camping for weeks in the wilds of Betelgeuse's canyons, waiting for Hector's ankle to heal. As they get ready to head back to the settlement, unaware that Alexa and Mark have finally reached the planet and made contact with the colonists, the matris sends Kim an invitation! What follows is an extraordinary encounter that will decide the future of Betelgeuse and change the course of Kim's life forever.
Mark and Kim are sent to Betelgeuse to look for survivors of the spacecraft crash that killed 3000 people seven years earlier. They do find some survivors, among them Tazio Menegaz and Colonel Logan, who tell them the colonisers had been divided over wether the indigenous Lums are as intelligent as humans. If they are, the humans would be forced to abandon their colonising enterprise according to UN law. Kim decides to investigate for herself.
A wounded Kim has been resuced by Hector, but they are stuck inside the planet's vast network of caves. Steve and Inge leave the expedition behind to look for them. All of them make their way through multiple, winding tunnels, trying to avoid particularly hostile and dangerous fauna in order to meet up - but the nightmare creatures aren't the only ones down there. A strange technology reveals itself - and soon an alien yet hauntingly familiar sight will put Kim on the track of Betelgeuse's hidden secret.
Bosnia, 1995. Serb forces are encircling Sarajevo and defying UN peacekeeping troops, even shooting at patrolling US Navy fighters. International politics keep American hands tied. After Tuckson disobeys orders and attacks a Serb position, he is disciplined by being sent to a secret base, where other pilots from the US military—including Buck—are training for a mysterious mission in unmarked planes. But this Ghost Squadron is not the only unofficial fighting force in the area...