Paul Château Têtard, 48, falls in love with a young woman working as a counter clerk in the subway. When he plans to marry her, his mother launches a private detective on her tracks to prove she's cheating on her son.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.