In 1971, family man Roger Perron and his wife Carolyn move to an old farmhouse in Rhode Island with their daughters Andrea, Nancy, Christine, Cindy and April. The family finds a hidden basement which the entrance is locked with planks. Soon they are haunted by noises and ghosts and Carolyn meets the famous paranormal investigators Lorraine and Ed Warren. They visit the house and Lorraine and Ed feel that the house is possessed by a fiend. Their further investigation shows that a witch has sacrificed her seven-day baby to Satan and has possessed other mothers that lived in the real estate to kill their children. Lorraine and Ed bring his friends Drew and Brad to help them to collect evidences to convince the Church that it is necessary an exorcism to save The Perron family from evil.