The music video itself portrays a teen who has his hand and wrist stuck in a huge wall of stone standing by a cliff. At the end of the video, he sees the "Love" of his life, buries a key in her, and calls her unforgiven.
A somewhat good song IMO, at the same time one of the most saddening songs I've heard. Apparently, it deals with love itself, and in James Hetfield's case, "Forgiving no one and ending up alone."
Dude2: Yeah. It reminded me of when I broke up with my Girlfriend. :(