House Swap (2010)

A young California screenwriter and his composer girlfriend exchange their Echo Park home for a sprawling Tudor mansion near Glastonbury, England, in the hope of finding creative inspiration. Thinking they have the best of the bargain, they soon learn that the house comes with a stalker who seems able to enter through locked doors. Driven beyond endurance by the continual harassment, the screenwriter sets a trap to exact his revenge... The film consists of 'found' material from the screen writer's video diary which, after the events, has been assessed by the Somerset police. This is a true story.