Imogene never planned to become a lunar commando. Not before her ex broke her heart and left her jobless. Now she'd better learn fast.

Descended from animal-human hybrids built for war, combat should be in the young caribou's genes. While Imogene is determined to master the moon's harsh battlefield, war clouds are brewing on the planet below, and once the storm breaks no training can ever be enough.

A soldier's first duty is to her country, but when black and white fade to dusty gray, the lines between friend and foe blur. As everything Imogene ever believed in crumbles, she must decide if some orders should never be obeyed.