Surveillance Mission

two worlds, possibly M class planets. One of these worlds contains strange ruins of long forgotten race from distant past of Alpha Quadrant. The objectives are simple: to scan these ruins, learn more about the planets and find out whether someone lives on them. Soon, the whole operation turns into something a lot of bigger than simple scan & run mission...
Two Federation Vessels - USS Excelsior captained by Adm. Fairbanks and USS Explorer captained by Cmdr. Sarek are on deep surveillance mission at previously unexplored part of space. They discovers