When valuable prisoner Lune Divinian disappears from his cell on Yavin 4, Luke is determined to find him. As the only link to X-7, the assassin sent to kill Luke, Div is the only hope to staying a step ahead of the Empire.

Across the galaxy, X-7 has escaped from Imperial custody. Caught between the past and the present, X-7 must fight the only battle for which he's not prepared: the battle with his identity. But his desperate confusion makes him more dangerous than ever.

A chance encounter and a figure from the past bring X-7, Luke, and Div together for a final showdown that will reveal everything—or destroy them all.