Tod and Phil, the reckless and adventurous Space Post Express couriers, have faced terrible dangers and survived to tell the tale. But in every space courier's career, there comes a time when they'll need to face their inner demons, the darkness they carry within. Or at least that's what Phil would try to tell his girlfriend, to describe this adventure in a way that would make him the hero.

For their next trick, Tod disappears and Phil has to find him following the trail his crazed cyborg friend has left. Tod first displays a variety of cyborg issues—that could be related to Tod's hardware or his software, Phil has no way to know—which include freezes and hallucinations, before finally vanishing into thin air, leaving behind cryptic notes he obtained through illegal means. But Phil sees that there's more to Tod's disappearance than just his characteristic lack of sanity.

Will Phil get to the bottom of his only friend's disappearance, or is there no bottom to this mystery? And who are these men in black suits following Tod's trail?