An elderly couple who opened their front door on Monday night to find a badly bashed, naked man pleading for help say they called triple-0 and covered the man with a blanket because of their Christian faith.
Police have hailed the pair as good Samaritans for helping the man when he staggered onto their front porch, covered in blood and barely coherent.
He told police that he had been mugged, stripped, tied up and locked in a car boot.
The man, who police are yet to formally identify and who speaks little English, desperately pressed on the front door bell of the Liverpool couple's home dozens of times at 8.45pm screaming "help me, help me".
The couple were watching TV at the time and opened the door to find a naked man, aged in his 20s and of Asian appearance, collapsed on their doorstep.
The elderly woman, who did not wish to be identified, said he was bleeding from the ears, had his wrists cable tied, was covered in cuts and bruises, could barely stand and was incoherent.
"I don't know how he could even reach the doorbell, he couldn't stand up," she said.
Police believe the man chose the couple's home for help because they had a light on.
"Luckily he's found a kind and caring couple who've opened the door for him," said Detective Inspector Danny Doherty.
The elderly woman said her husband immediately called the emergency services and her daughter-in-law rushed to her home around the corner to get a clean blanket.
"I was shaking like a leaf," she said. "But we couldn't just leave him there to die. We are Christians. We are good people. We had to help him."
The man was taken to Liverpool Hospital where he is in a stable condition.
Detective Inspector Doherty said initial investigations provided few clues as to how the man got there. Until police were given medical clearance to formally interview the man, they were unable to shed light on what had happened.
The elderly woman said police called a Mandarin interpreter on the phone at her home so that he was able to provide some details of his ordeal.
She heard the man tell police, via the interpreter, that he had had his wallet stolen by a group of people who then stripped him naked, cable tied his hands and locked him in a car boot before dumping him just a few doors down from the house where he sought refuge.
However, Detective Inspector Danny Doherty said police had not been able to confirm any details about the suspected abduction.
Police have appealed for anyone who saw a naked man around O'Brien Parade about 8.45pm on Monday to contact police.