When a routine traffic stop results in the unexplained, grisly death of her colleague, a cop realizes footage of the incident will play for her eyes only. As the attacks mount, she races to understand the supernatural force behind them.

When a routine traffic stop results in the unexplained, grisly death of her colleague, a cop (Mary J. Blige) realizes footage of the incident will play for her eyes only. As the attacks mount, she races to understand the supernatural force behind them.