On the planet of Liberum lies the super-massive city of Boris-Valka. Founded and governed by a body of corporate power houses for the last four hundred years, a much older and darker power lies deep within it's sewer system. Teams of sewer maintenance workers, nicknamed waste-walkers, remove massive fat-burgs and swarms of invasive insects larger than any found on Earth. Most are convicts, rejects, and the occasional naive volunteer. A chance encounter hurls Harvel Gillis and his adoptive sister Dibbuk Valez into a centuries old mystery that will change the meaning of existence itself.