Silence of the Saints.

In a small, isolated town where religion shapes people's worldview, a devout young girl watches as her family unravels after her younger brother returns from a night out with his friends, exhibiting strange behavior. Tormented by an inexplicable force, the boy descends into extreme paranoia with no clear cause. As she struggles to uncover the truth about that night, she begins to realize that her faith may not be enough to save her from certain realities.