In Book Four of the Space Academy Series, the Intergalactic Space Force seeks revenge after being attacked by a mysterious enemy. Have the Tourians joined forces with a new adversary to exact their own vengeance? Should the ISF strike back? Meanwhile, Joe struggles to fight off his wartime demons while preparing to embark upon a clandestine mission in search of his loved ones. With the power of the Black Medallion in his hands, this undertaking may lead to Joe's own demise-if its influence does not destroy him first. Come join Joe Devlin as he starts his journey, but hurry! Things will get rough fast with paranoia and treachery around every corner.