Dios te salve, María. Llena eres de gracia: El Señor es contigo. Bendita tú eres entre todas las mujeres. Y bendito es el fruto de tu vientre: Jesús. Santa María, Madre de Dios, ruega por nosotros pecadores, ahora y en la hora de nuestra muerte. Amen.
The fact they kept this a secret I'm assuming the creatures have taken over Earth and everyones living in a post apocalyptic state
The synopsis that we can tell from the trailer is that the girl woke up after being taken by some guy. She wakes up in a basement and freaks out. The actress gave an interview and said it's set in a "post-apocalyptic world." Not sure how it all ties together.
According to the movie's wiki, the girl got in a car accident, woke up in a shelter, the guy tells her the world has become a nuclear wasteland and she tries to escape.
JJ Abrahams said it's like Cloverfield's blood relative, not a sequel.