A person is being threatened by an anonymous individual who claims to know their address. The person and their sister, Maria, have been receiving threatening messages, and they have tried to block the sender but are still concerned for their safety. They have sought the help of a friend who is skilled at tracking down online information, and they are trying to uncover the identity of the anonymous person. The friend is using their skills to try and locate the sender's phone number and address. The person and Maria are also trying to communicate with the sender to gather more information and to try and resolve the situation peacefully.
Here are the key facts extracted from the text:
1. The narrator's sister received threatening messages from an unknown person on WhatsApp.
2. The person claimed to be at the door of the narrator's house.
3. The narrator and their sister were scared and tried to contact the person but couldn't.
4. They decided to track the person's IP address to find out who they were.
5. They had a friend who could help them track the person's phone number and location.
6. The person's area code was 011, indicating they were from São Paulo.
7. The narrator and their sister went to their friend's house to try to track the person.
8. They brought a notebook to write down any information they found.
9. The person had been sending threatening messages for a couple of weeks.
10. The narrator's sister had blocked the person's number, but they unblocked it to try to get more information.
11. They sent a message to the person asking them to respond and reveal their identity.
12. The person responded with a message telling them to go downstairs.
13. The narrator and their sister were unsure if the person was serious or just joking.
14. They decided to go downstairs to see if they could find any clues about the person's identity.
15. The person had sent a photo of a clown face, which the narrator found scary.
16. The narrator and their sister were walking around during the day, trying to find the person.
17. The person was typing messages but not sending them, leaving the narrator and their sister in suspense.