M. Night Shyamalan gets into (at least partially) found footage-style horror with his new film The Visit. In the trailer, we meet the brother and sister who go to Nana and Papa’s house — only to learn that something very, very weird is going on with their grandparents.

Shyamalan wrote and directed The Visit, which Yahoo! Movies says will be a PG-13 horror flick. So are the grandparents aliens? Cannibals? The witch from Hansel and Gretel and her husband? Of course, the greatest twist we can hope for is for Shyamalan to deliver a solid movie with some genuine scares.

The Visit is due in theaters on September 11, 2015.