A robber is arrested and his two siblings are shot dead by a cop. Same day, the cop's wife gives birth to twins. The babies have birthmarks on their foreheads, which just like the wounds on the two dead robbers.
Three generations of the Luo family fasted and chanted Buddha's name. However, Mr. Luo died young. Luo's mother complained and began to kill animals and eat meat. When Luo Bu grew up, her family property was wiped out by her uncle. Oppose and remarry someone else. After Luo's mother died, she went to hell. Luo Bu received God's instructions and followed Pratyekabuddha to practice, and his Dharma name was Mulian. However, because he could not bear the suffering of his mother in hell, he broke into the underworld to rescue his mother. After all the hardships, he finally felt the Buddha's will. Let Mother Luo be reincarnated.
After 30 years of living in a box buried six feet underground, the so-called Devil Claw breaks from his grave and takes over the body of a monk (Yuen Yat Chor), whom he uses to get revenge on the men who buried him decades before. With supernatural abilities to fend off blows, become invisible and use his extremities like swords, the reincarnated corpse is a vengeful force to be reckoned with, making for a classic kung fu flick that packs a punch.