Masquerade Ending Explained [SPOILER!]

SPOILER ALERT: the following article contains massive spoilers, including the ending. If you have not yet seen the movie, proceed at your own risk, or better, come back to this article later!

SPOILERS AHEAD

Masquerade Plot Summary and Synopsis

Eleven-year-old Casey is home alone – until a group of intruders, led by Rose, breaks in. They plan to steal her family’s priceless collection of artworks, but their reckless ambition is outmatched only by Rose’s opportunism. As the stakes grow even higher, Casey now finds herself in a fight for her life as the invaders prove they’ll stop at nothing to get what they want.

Source: Wikipedia (CC BY-SA 3.0).