Major Duncan Harris is a Union soldier serving aboard the space station Argo, leading one of the station's exploratory teams. He is quiet, reserved and has sworn off any personal relationships since his last one ended messily. Besides, working closely with various team members makes him uncomfortable. One of Argo’s engineers, Dr. Christophe Vabre, recently started serving on Duncan's team. Chris is slowly getting to know Duncan, but Duncan seems determined to keep him at arm’s length, and his mixed messages confuse Chris. When, on one of their missions, they discover a piece of technology that allows people to share their thoughts, Chris never imagines he’ll use it with Duncan—or that the machine will reveal the depth of Duncan’s true emotions. Duncan is horrified to find himself not only sharing his feelings but forcing Chris to reciprocate his advance. Mortified, he flees Chris’s lab—but before Duncan can discover the truth, an attack on Argo forces the station to evacuate. He and Chris will have to team up one more time if they want to save their home.