Paranormal horror. In the early 20th century a young woman who became known as Typhoid Mary (Jenny Lee Mitchell) was kept in solitary confinement in a New York mental institution, having been blamed for the spread of the fever. Years after her death, two friends decide to investigate her story, filming as they go. They soon realise, however, that Mary's spirit is keen to seek revenge and they will have to fight for their survival if they are to make it out alive...