If you watched Bird Box on Netflix over the Christmas break, you’re not alone. The horror film, which stars Sandra Bullock as a woman attempting to save two children from malignant supernatural forces , has been watched by over 45 million people so far – sparking a social media phenomenon and the inadvisable ‘Bird Box Challenge’.

But if you are among the 45 million who tuned in to watch Bird Box, you’re likely to have some questions. Why did characters’ eyes change colour? Where did the monsters originally come from? And what on earth happened to Felix and Lucy?

We’re still in the dark as far as the first two questions are concerned, but Bird Box’s director has now shed some light on the final mystery. Speaking to People, Susanne Bier said she thinks Felix (Machine Gun Kelly) and Lucy (Rosa Salazar) had a certain destination in mind after they stole the car and left the safe house.

“I think [the grocery store] was their plan, but we don’t know,” she said.

“I think that that’s where they wanna go, but I actually think it’s quite exciting that we don’t know exactly where they went.”

Bird Box’s director reveals where those mysterious missing characters went