Marv is one big, scary looking guy with a big heart. After a prostitute, Goldie, comes sleeps with him for her own protection from some bad guys, she is killed in the morning and Marv is framed.
He swears vengeance on the people that killed his love and sets out on a killing spree.
Cardinal Roark: Will that bring you satisfaction, my son? Killing a helpless, old, fart? Marv: Killing? No. No satisfaction. Everything up until the killing, will be a gas.