Forgotten Suns

For five thousand Earthyears, the planet called Nevermore has been empty. Its cities are deserted, with every trace of their inhabitants erased. Only a handful of nomadic tribes remain, none of whom remember the ones who went before. An expedition from Earth has been excavating one of the planet's many ruins, and attempting without success to find the cause of its people's disappearance. Now the expedition is in trouble--its funding cut--and unless it makes a major discovery, and soon, it'll be shut down.