Captain Thomas Krueger is a Marine commander who has just returned from fighting the Taliban in Afghanistan. After he is awarded for his heroism during a violent battle where beings from another world made a surprising appearance, Krueger is reassigned by his Afghan commander to Camp Pendleton, California, to complete SEAL training and investigate recent activity by the mysterious alien presence known as the Greys.

As Krueger slowly learns of the extent and complexity of the alien presence, he is joined by Samuel Diaz, a naval physicist who helps him understand the mission of the...

Captain Thomas Krueger is a Marine commander who has just returned from fighting the Taliban in Afghanistan. After he is awarded for his heroism during a violent battle where beings from another world made a surprising appearance, Krueger is reassigned by his Afghan commander to Camp Pendleton, California, to complete SEAL training and investigate recent activity by the mysterious alien presence known as the Greys.

As Krueger slowly learns of the extent and complexity of the alien presence, he is joined by Samuel Diaz, a naval physicist who helps him understand the mission of the...