Echo

Trapped in their New York brownstone's panic room, a hidden chamber built as a sanctuary in the event of break-ins, newly divorced Meg Altman and her young daughter Sarah play a deadly game of cat-and-mouse with three intruders - Burnham, Raoul and Junior - during a brutal home invasion. But the room itself is the focal point because what the intruders really want is inside it.

Two sisters return home after a stay in a mental institution, only to face disturbing events and a strained relationship with their stepmother. As eerie occurrences unfold, dark family secrets begin to surface, blurring the line between reality and nightmare.

An ominous help note finds its way to a 1980s post office, connecting a dead letter investigator to a kidnapped keyboard technician.