The crew of the Sisypheum from the Shattered Legions, broken and exhausted, find themselves divided. He is torn between following his resurrected captain on a suicide mission or obeying orders to return to Terra and reunite with his Legion brothers. After a series of garbled messages are intercepted by Kryptos, the fractured warriors descend on the surface of the Moon. Here, their bonds of loyalty, duty and devotion to each other will be tested as they face the ancient horrors of the early days of gene manipulation and uncover a long-buried secret. A secret that will have far-reaching consequences for the future of the galaxy, no matter who ends up with Terra.