Possession ending explained

What happens

In the apartment, Mark and Anna's story ends in gunfire and death. Afterward, Helen and the boy hear something outside that suggests the world beyond has been changed. What was real and what was collapse is left unresolved.

The last image

Helen and the boy listen to a sound from beyond the apartment, a sign that the world outside has somehow been altered.

Two readings

1 · Literal apocalypseWhat Anna made is real, and its arrival has changed the world.

2 · Projected collapseThe ending is a portrait of a marriage's breakdown, not events that happened.

What it says

The film treats a marriage ending as something large enough to reshape the world. Ending on a sound rather than an answer keeps you in that uncertainty, where grief, love and fear of being unknown stay unresolved.