The fog of age seems especially thick this morning; perhaps you can help.
I vaguely recall an adventure seed that appeared is some modern horror rpg supplement from the past five or six years. It involved the discovery of a pale, almost feral girl in the foothills of a local mountain chain. She gets brought back to civilization, gets examined and tested, and ultimately escapes back into the wild. It later turns out that she is a survivor or descendent of a group of school children who got buried in a cave system or fallout shelter in the mountains—and there’s a whole passel of them still out there. Does this strike anyone else’s memory bell?
I thought it appeared in White Wolf’s Mysterious Places, but a quick perusal of that didn’t find it. It might be in another WW book or in a modern CoC supplement, but I can’t remember for certain. I’m pretty certain I didn’t make this one up on my own—it’s a bit off the beaten trail even for me—but I could be wrong…
EDIT: It's "The Girl from the Snow" located in the back of WoD Asylum for those playing along at home.