Two Austrian sisters Dagmar and Ursula Beyne go on holiday along the Amalfi coast in Italy, in the hope of finding their mother, who deserted them when they were young, they have recently inherited some money after the death of their father and want to share some of it with their mother. Ursula is quite a fragile girl though and on medication ever since the loss of her father. She also is somewhat telepathic and can foresee bad events in an instant. They book into a local hotel where Ursula's visions continue, she tells Dagmar her sister to stay clear of Filippo, a man who hangs out in the hotel bar as she says he will cause her death.
Filippo is a heroin addict whose lover "Stella Shining" is the night club singer at the hotel, but that relationship is soon in trouble and Filippo makes his move on Dagmar. Meanwhile a masked and leather gloved man hires a local hooker, he wants to be a voyeur while she makes love to another man, she agrees and he hides behind the curtains in her room to watch the proceedings. When the deed is done the stranger savagely kills the hooker.