Trap

Cooper (Josh Hartnett) takes his teen daughter to a pop concert to see her favorite singer, Lady Raven (Saleka Shyamalan). They have great seats, right in front of the stage.

When Cooper leaves for a moment to visit the restroom, he spots an excessive amount of police in the arena and surrounding it, and finds out that Federal agents have set up a trap to catch a serial killer known as The Butcher, who is supposed to be in attendance.