Cruel Revenge(1969)

Original title: 피도 눈물도 없다

President Choi of Dongseo Shipping is at the verge of bankruptcy because one of his ships has sunk. Right on time, a man comes to Choi and offers to lend money by taking his remaining real estates as security and staying at his place. The man turns out to be a son that Choi has abandoned. The mother has died after living a hard life, and he wants revenge.