Abby and Rebecca Powell have been estranged since a distressing incident in their childhood drove them apart. After more than ten years, they reunite to scatter their mother’s ashes at a remote lake. As they attempt to mend their relationship and heal past wounds, something lurks in the nearby forest. A mysterious artifact, not crafted by human hands, draws them in. As they try to unravel its mysteries, Abby is haunted by vivid nightmares of an alien presence that feel disturbingly real. Unbeknownst to the sisters, this artifact is actually a device with a terrifying purpose beyond their understanding. As past and present events intertwine, new revelations threaten to shatter their fragile family bond, while the non-human creators of the device seek to complete a dreadful experiment initiated years ago.