The Wicker Tree

The Wicker Tree is a 2011 horror film written and directed by British filmmaker Robin Hardy. The film contains many direct parallels and allusions to the 1973 film The Wicker Man, which was also directed by Hardy. The Wicker Tree is neither a sequel nor a remake, but is intended as a companion piece which explores the same themes. It is the second part of The Wicker Man Trilogy. The film premiered at the Fantasia Festival in Montreal, Canada, July 2011 and was released on Bluray in the UK on April 30, 2012.

After performing a concert at a local cathedral, the duo are approached by Sir Lachlan Morrison and his wife Delia, the laird of the small village of Tressock in the Scottish lowlands. They invite Beth and Steve to come back with them to preach, but intend them for a more central part in Tressocks May Day celebration.Meanwhile, detective Orlando is sent to Tressock, posing as the local police officer, in order to secretly investigate reports of a pagan cult. Orlando discovers that the people of the village worship the ancient Celt goddess Sulis. ........

Source: Wikipedia