Just before Abby collapses in the forest while trying to photograph an elusive loon, she hears a cry that sounds almost human. But it couldn't be, could itDiagnosed with a case of pneumonia, she is confined to her living room, where she begins to notice strange things happening in the newly sold house across the street. People coming and going at all hours, disturbing noises, and a glimpse of a deadly weapon make Abby worry that someone is about to get hurt. Is her high fever just playing tricks with her mindFrom her sickbed, she vows to find the truth, but the secretive new home owner isn't talking. Mary, now thrust into the role of caregiver, helps Abby search for answers, and the two sisters soon discover that things aren't always what they seem.