Kill-Fist

On the verge of losing custody of his daughter and struggling to care for his ailing father, a down on his luck insurance salesman named Zhang enters a secret, real life fighting game for prize money. As he progresses through increasingly brutal matches against other desperate individuals, he discovers the game is an elaborate revenge scheme. The mastermind is the daughter of a man he and his friends killed in their youth, forcing Zhang to fight for his life and confront his past.