Father Jacob is a Catholic priest, getting on in years and having quite a few problems with the church hierarchy. When several people begin acting strangely and it is believed that the cause is demonic possession, the good father becomes embroiled in the rites of exorcism, encouraged by the chief exorcist who wants Father Jacob to succeed him in his role after his own death, which he believes is imminent. Father Jacob is extremely reticent about the idea but circumstances overwhelm him as more as more troubled and possessed people come into his life.
Eventually, aided by a reluctant nun, who clearly dislikes him, Father Jacob accepts that what he is being asked to do is what God wants from him, and so begins his journey into the darkness.
This excellent should not be missed by anyone who enjoys brilliant acting, a fast-paced script and the odd terryfying encounter with the forces of evil.