By the autumn the travellers arrived at a great mountain. They saw on the road a red cloud which the Monkey thought must be a demon. It was in fact a demon child who, in order to entrap the Master, had had himself bound and tied to the branch of a tree. The child repeatedly cried out to the passers-by to deliver him. Sun suspected that it was a trick; but the Master could no longer endure the pitiful wails; he ordered his disciples to loose the child, and the Monkey to carry him.

As they proceeded on their way the Demon caused a strong whirlwind to spring up, and during this he carried off the Master. Sun discovered that the Demon was an old friend of his, who, centuries before, had pledged himself to eternal friendship. So he consoled his comrades by saying that he felt sure no harm would come to the Master.