Oskar Schindler bought a Jewish owned enamelware manufacturer know as Emalia.
He had Jews in the near by ghetto ,Kraków,work at Emalia.
When Kraków got liquidated in 1943 he let his Jews stay at Emalia over night
He bribed the SS in the concentration camps where his Jews went to treat them fairly so they can still work hard for him and so they won't be deported to other concentration camps.
He persuaded the SS to make Emalia a sub camp in Plaszow
He also let 450 Jews in nearby factories live at Emalia.