A possible concise summary is:
Two kids prank call their friend and tell him his grandparents died in a flamethrower accident. His real grandparents show up, but he doesn't believe them. The kids try to convince him with the help of a cop and a doctor, but he still thinks they are lying. Meanwhile, the prank call scenario actually happens outside the house, but the friend doesn't notice. The kids apologize for lying and the friend forgives them. The cop reveals he has a secret lover named Todd.
Here are some key facts extracted from the text:
1. Cody and Junior prank call Joseph and pretend to be his long lost grandparents who want to give him money and take him around the world.
2. Joseph believes the prank and gets excited to meet his grandparents.
3. Cody and Junior feel bad and try to tell Joseph the truth, but he doesn't believe them.
4. Joseph's real grandparents show up at Junior's house, but Joseph thinks they are hired actors.
5. Cody and Junior call the police and a doctor to prove that Joseph's grandparents are real, but Joseph still doesn't believe them.
6. A man with a flamethrower kills Joseph's grandparents, a limo driver, a news crew, and himself in front of Junior's house.
7. Joseph finally realizes that Cody and Junior were telling the truth and forgives them.
8. Chef Pee Pee gets a phone call from his ex-boyfriend Todd, who wants to see him again.