In 1940s Los Angeles, when womanizing composer Keith Vincent is found dead, the inquest concludes it was a suicide but police detective Joe Warne isn't so sure.

An imaginative boy who frequently makes things up witnesses a murder, but can't get his parents or the police to believe him. The only people taking him seriously are the killers - who live upstairs, know that he saw what they did, and are out to permanently silence him.