Music teacher Mark witnesses the murder of psychic Helga and decides that he needs to investigate this case on his own. Meanwhile, the killer goes around killing people. A character introduced out of nowhere ends up being the killer and there is an epic struggle at the end.
This movie is awful. I watched the censored American version, which omits twenty minutes of the most brutal violence, but even so is way too long with a running time of 100 minutes. Nothing happens in this movie! All I can remember about this movie is nearly 100 minutes straight of footage of Mark slowly walking in houses looking at things, punctuated with completely over the top and convoluted murder scenes.
There is simply nothing in this movie to merit a recommendation. The characters are dull, the dialog pointless, the pacing so slow that any attempt at suspense results in boredom. It doesn't even have the wonderful sense of color that Argento's Suspiria boasts. I really can't see how this movie is seen as a classic, when horror masterpieces like Martin and A Bell from Hell were being released around the same time (give or take a few years). Even trash like Scream Bloody Murder or Blood Freak is more entertaining than this poorly-paced film. And the title is dumb! Deep Red... you know, like blood and also like strawberries. And putting a doll on your poster isn't scary! Even if it is transcending the boundary between posters and reality and cutting the title on the poster to death. And also I hate your dog, movie, and your face is stupid!