Catholic priest Jon Urski has broken the rules, so he is sent to Mokus, an abandoned parish in the middle of a marsh that has been without a spiritual leader since the mysterious death of the previous parish priest, Janos Talaber. Jon Urski is resolved to rebuild the ruined church at Mokus with the villagers' help. But the people are afraid that restoring the church will arouse pagan demons. Then the wild water rises--water is pouring into the restored church from all sides and starts to erases the borders between reality and dreams.