The ISF Althaemenes was the first of its kind. A spacecraft capable of travelling the vast distances to other stars. But on its maiden voyage to Proxima Centauri, all contact was lost and its crew never returned.

Four years later, the United Earth Confederacy received the ship's distress signal.

Captain Helene Cross and the crew of the ISF Apemosyne are sent to determine what happened, and if possible, rescue the wayward explorers. However, there is no response from the crew and the mystery deepens when scans show that the supposedly stranded vessel is in full working order, leaving Helene and her team no other choice but to board and investigate. Soon, a maddening presence begins to stalk their minds, influencing their actions, threatening their very survival.
The crew of the Apemosyne must discover the source of the madness and put an end to it if they are to have any hope of escape.