Father Hugue de Watteau is sent to investigate the mass murder of clergymen that took place at a church in Amsterdam. Hugue rescues Sister Agnes, the sole survivor of the attack on the church, from a vampire who attempts to take her away. The two are later captured and brought to a regional vampire whose intention is to use a machine to probe Agnes's memories to find out who is responsible for the murders. Agnes is released after data is extracted from her memories; Hugue, however, is bound and placed in a pit in which he must fight for his life against a werewolf. Agnes, refusing to allow Hugue to die, retrieves his staff and throws it down to him. The regional vampire stabs Agnes in retaliation, which sends Hugue into a murderous rage. After making quick work of the werewolf, he kills all of the vampires in the building. Afterwards, it is revealed Agnes survived her injury.