In 2011, a psychiatric patient is visited by a postulate. The patient is a retired head of the "D" Group – a secret department of the Security Service to fight against the Polish Catholic church. Murders, beatings, blackmails, provocations, robberies, those are standard methods of operation for its officers. The postulate wants to unravel the mystery of the death of priest Roman Kotlarz, a parish priest from Pelagow.