In the tradition of such real-life horror movies as 'The Exorcist' and 'The Exorcism of Emily Rose', "The Haunting in Connecticut" tells the astounding true story of one family's supernatural ordeal. When Sara (Virginia Madsen) and Peter (Martin Donovan) Campbell's son Matt (Kyle Gallner) is diagnosed with cancer, they uproot their family to Connecticut for his treatment. As the family settles into their new home, Matt grows increasingly disturbed by paranormal activity that seems to inhabit and possess the house. At a loss to help her frightened family, his mother turns to an enigmatic priest (Elias Koteas) who appears to rid the house of its ghosts - until the boy's condition takes a sudden and unexplained turn for the worse and their lives are put in grave danger.