I remember a movie about a group of people that were in some kind of sect. They were chasing a girl to do a sacrifice with her. With the help of her boyfriend of friend they were running and hiding.

In the scenes I remember :

One time they were in a house, they traced lines on the floor arround them which protected them during night, on the morning, there was piles of books arround.

One time, they tried to hide the girl into some kind of bunker of a friend, the kind of survival guy with a lot of weapons, but he failed.

At the end of the movie, they took the guy instead of the girl for the sacrifice.