hm... I am intrigued. Explain more, please.
Fenrir is said to be one of Loki's children (How that was possible, i'll never know), and he was either causing problems, or was a threat to Odin, but w/e the reason, the dwarves made a special leash made out of items that are realisitically impossible to achieve, and they got Fenrir onto a small island, where a god sacrificed his hand (Fenrir was trying to tear it off) so that Odin could bind Fenrir to a post on the island. once Fenrir was tied down, he tried to break free, but found it impossible to break the leash as it got tighter with each tug. So until Ragnarok occours, Fenrir will always remain on that island, desperatly trying to break the leash.
If I miss anything, please correct me