From the introduction:
You are summoned to attend a Deep Geological Repository - an underground facility intended for the long term disposal/storage of toxic waste. Then things get worse.
Multensa Co. won a government bid to digging a site with the potential to act as a Deep Geological Repository for nationally produced nuclear waste. Workers have gone missing.
This is a modern day 'narrative first' scenario and would be ideal for a one-shot, or short series of games, easily adapted to any Cthulhu Mythos or horror rule system.