A unidentified beige ooze bubbles up out of the ground, spreading onto a highway in Detroit. Initial suspicion immediately falls on a nearby refinery (naturally), but the foam isn't a product of that operation. EPA officials have so far been unable to determine the composition of the mystery substance.
https://www.clickondetroit.com/news/...es-authorities
They slimed us. That's great! Actual physical contact!
But with what? Grey goo from the nearby nanite lab? The alien meteorite back in the woods, pulsing green, is affecting the local wildlife (and little Billy)? The underground cultists have tapped the dimensional barrier and are calling forth Things Even Detroit Was Not Meant to Know? Case Zero of a plague that will have the survivors wishing it were something simple, like zombies?