Bonjour, pouvez-vous SVP?:/ Je dois résumé en anglais le texte ci-dessous. Merci d' avance

The text is about an Hitcock's movie.
It's the story of Jeff, a photographer confined in his apartment. To spend time, he observes his neighbors. He thinks there has been a murder so he warned a detective and one of his friend. However they don't believe him...
The text doesn't tell us what happened then.