A desperate mother, played by Jennifer Jason Leigh, moves her family into a foreclosed Long Island home hoping its low cost will aid her comatose son's recovery, unaware of its terrifying history. Her teenage daughter Belle, portrayed by Bella Thorne, is immediately skeptical of the strange occurrences that begin to plague the house, while her younger sister and brother, Mckenna Grace and Hunter Goligoski, witness unsettling phenomena. The family’s new beginning takes a sinister turn as Belle and her friend Thomas Mann investigate the property's dark past, discovering it is the infamous Amityville house where a wave of violence once unfolded. Directed by Franck Khalfoun, this chilling chapter in the iconic horror saga builds an atmosphere of creeping dread as the line between the son's medical condition and a malevolent supernatural awakening begins to blur, trapping the family in a nightmare where the house itself seems to be watching and waiting.