Vaontis is the home planet of the aliens and a spin-off of the Thorenzitha series
The cyborgs scan the surface of the alien moon with their shuttles but cannot detect the aliens ship now converted into a base after it crashed landed because hidden inside a cave that has its entrance concealed with a camouflage force field. While sneaking around at night after escaping his cell and with no access to ship, airlock, or other way out, CY10 needs to find a way to shut off the beams that create this force field so he and the other prisoners can be rescued by the shuttles outside that can then destroy the alien base.
