The Titans face their final challenge as the true enemy is revealed. An alien armada is heading toward Earth, and Superboy must decide once and for all where his true allegiance lies. Will Starfire join forces with her evil sister, and what mysteries lurk far below the streets of Metropolis?

Blackfire victorious! Earth has fallen to the queen of the Tamaraneans, with the Titans completely at her mercy?all except one. It?s a family reunion like no other as Starfire faces her sister with a surprising ally in tow. And all the time Black Zero wrestles with his new identity? Is he ready...