The story begins with an old, nameless prophet from Bethel who found another nameless prophet, the "man of God" from Judah, sitting under an oak tree.
Now there dwelt an old prophet in Bethel ... And he ... went after the man of God, and found him sitting under an oak. 1 Kings 13:11-14
The old prophet invited the man of God to come over to his house to eat, but the man of God said that he couldn't, since God told him not to eat or drink anything.
Then he said unto him, Come home with me, and eat bread. And he said, I may not return with thee, nor go in with thee: neither will I eat bread nor drink water with thee in this place: For it was said to me by the word of the LORD, Thou shalt eat no bread nor drink water there. 13:15-17
But the old prophet told the man of God that he was also a prophet and that an angel told him to go find the man of God, bring him back to his house, and give him some food and water.
He said unto him, I am a prophet also as thou art; and an angel spake unto me by the word of the LORD, saying, Bring him back with thee into thine house, that he may eat bread and drink water. 13:18a
Too bad for the man of God, but the old prophet was lying. (If you can't trust an old prophet, who can you trust?)
But he lied unto him. 13:18b
So the man of God went to eat at the lying, old prophet's house.
So he went back with him, and did eat bread in his house, and drank water. 13:19
Then God told the man of God (through the mouth of his lying prophet) that God was pissed at him for...I don't know what. Eating and drinking when God told him not to (even though a prophet of God told him that God said that he should)? Believing a lying prophet of God? What?
I don't know. But here's what the God's lying prophet said:
The word of the LORD came unto the prophet ... saying, Thus saith the LORD, Forasmuch as thou hast disobeyed the mouth of the LORD ... But camest back, and hast eaten bread and drunk water ... thy carcase shall not come unto the sepulchre of thy fathers. 13:20-22
After the meal, the man of God went on his way. And then a lion met him on the road and killed him.
And it came to pass, after he had eaten bread, and after he had drunk, that he saddled for him the ass ... And when he was gone, a lion met him by the way, and slew him. 13:23-24a
The lion hung around the dead man of God for quite a while. Lots of people came to see the carcass and the ass and the lion by the side of the road.
And his carcase was cast in the way, and the ass stood by it, the lion also stood by the carcase. And, behold, men passed by, and saw the carcase cast in the way, and the lion standing by the carcase. 13:24b-25