‘Berserk’

A mysterious warrior calling himself The Black Swordsman is out to get the King of a country called Midland. As he battles the king’s henchmen, their cries of pain and the spilling blood take this relentless warrior’s mind back in time to the path that led him to his current state.
On just any day, a pack of hooligans are harassing a young lady in distress when all of a sudden, they’re under attack. The Black Swordsman has returned. He wields a giant sword as large as his grudge against the king. When alone in the woods, the Black Swordsman has a flash back to years past and his trials and tribulations in the Band of the Hawk, a successful band of mercenaries under the charismatic leadership of Griffith, a man driven by the ambition to become king.

Descriptions taken from AniDB.net