A young man tries to discover the identity of the killers of his girlfriend with only the voice of one of them as his clue. A young man tries to discover the identity of the killers of his girlfriend with only the voice of one of them as his clue. A young man tries to discover the identity of the killers of his girlfriend with only the voice of one of them as his clue. A young man tries to discover the identity of the killers of his girlfriend with only the voice of one of them as his clue.