The new and untested insertion destroyer “Tunny” rips through hyperspace toward the edge of the galaxy where every human-built ship able to make the long journey amasses to fend off a massacre of frontier colonies by a little-known alien species. The five hundred marines and crew aboard the Tunny are anxious to join the defensive, but the dark and vast expanse in between hides a secret that may end their quest before it begins. Will they make it to the battlefront?