No Tears for the Dead

Abandoned by his mother shortly after immigrating to the United States, Gon is raised by the mafia and grows up to become a cold-blooded hitman. Though usually flawless in taking out his targets, Gon makes a terrible mistake of killing an innocent young girl. Swamped by feelings of regret, guilt and shame, Gon no longer wants to be a hitman, but his boss gives him one last mission.