This is the story for anyone not knowing what the blair witch is...
Febuary 1785, Several children accuse Elly Kedward of luring them into her home to draw blood from them. Kedward is found guilty of witchcraft, banished from the village during a particularly harsh winter and presumed dead.
November 1786, By midwinter all of Kedward's accusers along with half of the town's children vanish. Fearing a curse, the townspeople flee Blair and vow never to utter Elly Kedward's name again.
August 1825, Eleven witnesses testify to seeing a pale woman's hand reach up and pull ten-year-old Eileen Treacle into Tappy East Creek. Her body is never recovered, and for thirteen days after the drowning the creek is clogged with oily bundles of sticks.
March 1886, Eight-year-old Robin Weaver is reported missing and search parties are dispatched. Although Weaver returns, one of the search parties does not. Their bodies are found weeks later at Coffin Rock tied together at the arms and legs and completely disemboweled.
November 1940- May 1941, Starting with Emily Hollands, a total of seven children are abducted from the area surrounding Burkittsville, Maryland.
May 25 1941, An old hermit named Rustin Parr walks into a local market and tells the people there that he is "finally finished." After Police hike for four hours to his secluded house in the woods, they find the bodies of seven missing children in the cellar. Each child has been ritualistically murdered and disemboweled. Parr admits to everything in detail, telling authorities that he did it for "an old woman ghost" who occupied the woods near his house. He is quickly convicted and hanged.
Then you have to see the movie to know the rest...