Answer:
once upon a time a group of children were wanted to explore which was on the top of hill. they had reached to the top of hill after sometime groaning sound which was coming from the house.so they had entered into the house slowly they had opened the door and shocked that a young boy was tied to the chair and he was moving to go out from that houseby scientist the children had realised that the boy and discovered the house was the hide out for understand kidnapped that boy so the children had informed the police about the house when they returned to home they had awarded by the people for their braveness '"title was a group children and the mystery of a house."'
