Arctic Wolf / Avengers fanfic mash-up

Grace lives the glamorous life of a teenage werewolf bounty hunter. Her "hero" name she goes by is the Arctic Wolf and she is about to be plunged into deep waters when she receives a call from Nicklaus Fury himself asking her and 3 of her friends to come and help S.H.E.I.L.D. And the Avengers face a new threat they may not be able to take on alone.