SHIELD was formed to protect against the supernatural. The Great Strangeness began in the wild places and is slowly spreading across the globe, leaving people changed in its wake, or at least those who survive as villages become forests and creatures destroy lives. Humans flock to the cities, populations becoming concentrated, like gathering around campfires in the dark.

Clint has arrows dipped in holy water. Natasha has silver bullets. And one of them has a secret.