A masked killer stalks an institution for mentally disturbed rich women.
Police detective Paolo Germi and the mysterious Marisa meet each other at a dance hall. Germi is unsuspecting of the secret Marisa is carrying with her: adverse conditions forced her into prostitution. As Germi finds the young girl brutally murdered, he decides to go after her killers. During his investigation, he enters a world of intrigue and obfuscation that leave an endless trail of blood.
A number of unexplained military deaths hit Italy and are ruled to be accidental or suicides, but police inspector Giorgio Solmi suspects otherwise. When a mysterious wealthy electrician is seemingly murdered by a female escort, a sinister plot slowly begins to unravel.
