Thwarted by his despotic uncle from continuing his love affair, a young man's thoughts turn dark as he dwells on ways to deal with his uncle. Becoming convinced that murder is merely a natural part of life, he kills his uncle and hides the body. However, the man's conscience awakens; paranoia sets in and nightmarish visions begin to haunt him.

Directed by: D.W. Griffith
Written by: D.W. Griffith
Runtime: 83 minutes
Tagline: The criminal haunted by tortures of the mind
Cast:
Josephine Crowell Josephine Crowell
The Sweetheart's Mother (uncredited) 
Walter Long Walter Long
The Detective (uncredited) 
George Siegmann George Siegmann
The Italian 
Blanche Sweet Blanche Sweet
The Sweetheart 
Henry B. Walthall Henry B. Walthall
The Nephew 
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Also known as:
  • La Conscience vengeresse
  • Avenging Conscience
  • The Murderer's Conscience
  • Thou Shalt Not Kill