The narrator is suspicious of Davi, who has been collecting over 200 diamonds daily. The narrator investigates and discovers that Davi is robbing a bank, not mining diamonds as he claims. The narrator decides to set a trap for Davi by disguising their house as a bank and creating a trap inside. When Davi falls for the trap, the narrator plans to turn Davi's house into a prison, putting an end to his thieving ways.
Here are the key facts extracted from the text:
1. The speaker is suspicious of Davi's activities and thinks he might be stealing or doing something wrong.
2. Davi comes home with over 200 diamonds every day.
3. The speaker decides to investigate Davi's activities and follows him.
4. Davi is seen going to a bank and the speaker thinks he might be robbing it.
5. The speaker comes up with a plan to catch Davi in the act by turning his house into a fake bank.
6. The speaker sets up a trap for Davi, including a fake dollar sign and iron blocks to disguise his house as a bank.
7. The speaker also sets up a trap inside his house, including lava and invisible clay blocks.
8. Davi falls for the trap and is caught by the speaker.
9. The speaker lectures Davi about not committing crimes and taking other people's money.
10. The speaker decides to turn Davi's house into a prison to prevent him from escaping.