Nami is an artist working with a computer games development company creating a game to be called St. John's Wort. But the key to the game is the house that she has recently inherited from her father. A house that is surrounded by St. John's Wort. In a film that mixes computer graphics with surveillance cameras, as well as with a range of more conventional techniques, St John's Wort breaks through the barriers of reality and illusion on many levels. In doing so, it not only presents a completely original kind of horror film, but also grafts computer game imagery onto the film narrative to create, possibly for the first time, a completely unified experience.