I think it's about prostitution.
"When I met her at the roundabout" - stopping on the road to pick her up
"Retrieves your oldest coin" - it's said prostitution is the oldest trade
"Leads you blindly down every dark alley" - well, self explanatory
"You need protection from every direction" - again, self explanatory
I think it's about prostitution. "When I met her at the roundabout" - stopping on the road to pick her up "Retrieves your oldest coin" - it's said prostitution is the oldest trade "Leads you blindly down every dark alley" - well, self explanatory "You need protection from every direction" - again, self explanatory