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.