Back to Terah begins with Kahill, Peter and Becarra traveling to Terah to free it from Frauliege, its despotic ruler. Many of those who fought with them to save Earth follow, bringing with them others prepared to face the possibility of not being able to return to their homes. Working with Teran's Resistance they prepare for the upcoming war, facing challenges, dangers and seemingly insurmountable obsticles. With allies both known and unexpected, the war for Terah begins.