Nocturne in H (1970)

Luca wanders around aimlessly, devastated by his friend's passing in an unsolved murder case. As the night draws on, tormented by his paranoia, anxieties, and intrusive thoughts, Luca's memories take a sinister turn as his guilt consumes him. Teetering dangerously on the line of what is real and what is illusion, Luca's sanity begins to slip.