Anyone have an idea what this film is called?

So I saw a preview of this film where in this preview show a girl and guy are flirting at school and the day is over. Then as a driver and passenger pull up to a gate and say they are picking up this girl. The school security guard says you arent the normal guys and the guys in the car kill him. Then is shows the boy being picked up by his big brother/uncle/dad(not sure). He asks some questions and goes looking for the girl out of a hunch and the lights in the school go out and they try to abduct/kill them. That is somewhat of the preview! Anyone have an idea please respond! Could be an old film like 2-3 years or could be one not out yet! Let me know please! and thank you!