One last mission...After a long and exalted military career, General Connor Gates thought he was finally ready to retire?He was wrong.When interstellar probes sent to Earth's star system report back 40 years earlier than anyone expected, the colony learns that not only did people somehow survive the cataclysmic events of the past but so did the enemy. The colonists owe their lives to the sacrifice made by the people of Earth. There are survivors on Earth struggling to survive and the colonists have the technology to turn the tide.Someone must lead an expeditionary force back to Earth. Connor might have been ready for retirement, but Earth calls, promising answers to what had happened so long ago. Can Connor and his friends survive one last mission and pay back a debt of sacrifice made long ago?