Of all the people to star in an early 80's slasher film, Frankie Avalon doesn't seem like the most obvious choice and yet here he is, trying to give a respectable performance as the screenplay of Blood Song lets him down nearly every step of the way. Don't get me wrong. There's still some fun to be had with Blood Song, but it's not as taut and potentially thrilling as it could have been.
A young boy witnesses his father killing his mother, her lover, and then himself and is so in shock that all he can do is play his little wooden flute his father made him. Cut to present day and he decides to escape from the mental hospital where he's been cooped up forever. While he was there, he donated blood and this blood provided a life saving transfusion for a teenage girl named Mary (Donna Wilkes) after her father got them into a horrible accident which left her in leg braces.
Somehow, this shared blood has given them a psychic link and Mary can see him escaping and killing anyone along the way who says something disparaging about his flute.
If Blood Song had left out the silly blood transfusion leads to psychic visions subplot and kept the killer's flute out of it, it would probably be a much more effective movie. As is, it's too unintentionally hilarious to have the tension of chase scene broken by Avalon pulling out his flute and playing a few notes.
The acting isn't horrible, but Wilkes has been better in other films. The downbeat ending is a really punch to the stomach as well, but would have fit better into a more frightening film.
