Night of the Living Dead

Barbra and Johnny Blair drive to rural Pennsylvania to visit their father's grave. Barbra is attacked by a strange man walking in the cemetery. Johnny tries to rescue his sister, but the man throws him against a gravestone; Johnny strikes his head on the stone and is killed. Ben arrives and takes Barbra into the house, driving the "monsters" away and barricading the doors and windows. The zombies are reanimating and eating the flesh of the living.