This is a sadistic blockbuster "Holy Death" directed by South Korean ghost director Kim Ki-duk.

Golden Rooster Award at the Venice Film Festival
The man is an out-and-out bastard, fierce and cruel, doing violent debt collection work in a loan shark company, and lending exclusively to poor people who can't afford to pay it back, and the poor have to sign an accident insurance when they borrow money.
Since the interest rate of usury will be tens of times higher than the principal in a short period of several months, some people have begun to sign insurance loans due to the compulsion of life. And people who can't pay enough money are collected by the male owner, these people repay the debt in the same way, that is, they are forcibly removed by bandits to remove an arm or other parts of the body, using the insurance premium claim method to defraud high premiums to offset the debt, many people are overwhelmed, some simply take medicine to commit suicide, and some hang their lives.
It is such a lonely, frightening scum, but suddenly there is a mysterious woman in life, the woman entered the door began to clean up the housework for the male protagonist, the male protagonist was stunned, but the woman was haunted, and claimed to be the mother of the male protagonist, abandoned him when he was young, and now wanted to make up for the male protagonist as much as possible, the male protagonist began to only when she was a crazy woman. But after three times and five times, the woman left her own phone and disappeared, after disappearing for a period of time, the male protagonist felt empty in his heart, this day he was drunk and drunk, looking at the woman's contact information, pondering for a long time He dialed the phone, the woman sang a lullaby to him on the phone, the male owner pushed open the door only to find that the woman had never left him in the corridor. In order to prove that he is not his mother, the male protagonist gives the woman a piece of raw meat, and if the other party eats it, he admits that he is his mother. After the woman ate it, she found that it was actually the meat that the man himself dug down from his legs, and although she felt disgusted, she still swallowed it hard. But still the male protagonist did not forgive, taking advantage of the wine to play a rogue on the woman, when the male protagonist was about to commit violence, the woman cried loudly, and the male protagonist gradually recovered his sanity and let go of his bestiality. The woman cooks for the male protagonist and does housework, and the male protagonist has accepted her in his heart. The male protagonist was curious and asked the woman if she had a family or other family, and the woman did not make a sound, but thoughtfully knitted a sweater. A lost mother who appeared out of thin air made this iron-hearted male protagonist gradually appear weak.
After spending time with women for a while, the male protagonist also had compassion, and when collecting debts, he accidentally let go of a small master who was about to become a father, and another old man who owed a loan shark, he looked at the neighborhood where he had lived for 50 years, sighed a lot, and finally jumped from the 7th floor, a hundred. Looking at the old man who was forced to jump off the building, the male protagonist pondered for a long time, and he began to think about what money really is? He asked the woman, and the woman gave his answer – love, fame, violence, anger, hate, jealousy, revenge. The longer he spent with women, the more dependent he became on her, hearing the word revenge, he began to tense up, before he was alone, he was fearless, and now women have become his weakness, he is afraid that his enemies will take her to the knife, and soon the enemy will find the door and hold the woman with a knife, the male protagonist in order to save the woman, throw out a flying knife, stab the enemy.
After that, the woman gave the male protagonist a birthday and took care of the housework, and the male protagonist gradually felt that he could not leave the mother who appeared out of thin air, but how to know that the male protagonist had been played between the palms of his hands, and after the birthday, the female protagonist took the male protagonist to the river, planted a pine tree with her own hands, and told the male protagonist that if she died, she would bury her under this tree. Then the woman left the male protagonist, self-directed a bitter meat plan, he stood on the high rotten tail upstairs, pretended to be pushed down by the male owner loan shark, jumped, and ended his life.
According to the agreement, the male protagonist buried the woman under the pine tree, but when he dug the pit, he found a male corpse, wearing a mother's sweater. The truth is clear at a glance, it turns out that the woman is not the mother of the male protagonist, the sweater is knitted by the woman for her own son, and his son was hanged by the male owner in his own workshop because of debt. However, all this is for revenge, if you just kill the male protagonist, it is too cheap for him, so he directed himself to perform a big drama, the purpose is to make the male protagonist feel the same pain as him, which is called killing the heart, the male protagonist forced the sweater off the corpse to put it on himself, and felt the warmth of his mother for the last time.
The male protagonist who returns to being alone has become a walking dead, and he chains himself to the car of the woman who sells popcorn, and when the car starts, he also begins his own road to redemption. It is true that this is a cruel but tragic film, although the theme of revenge has always been a home cook in Korean movies, but this movie portrays a mother's road to revenge and redemption to the fullest, poignant and touching.
In the early morning on the highway, a blood trail, all the way, extremely shocking, although the male protagonist chose to die, but his human nature has awakened, and finally in this way to complete the salvation of the soul, he is no longer a beast.