Nico was in the Underworld. And he was bored. The underworld was a gloomy place, and there was not much to do. He sighed, and decided to take a walk to Elysium. The ghosts around the castle didn't really pay attention to him, and it took him twenty minutes to walk to the gated community. The place was like a never-ending party. He looked around. The people had fun, but they didn't really see him. He walked through Elysium with a bored expression on his face. 'Nico! Nico!' Somebody suddenly screamed. He turned around. He saw Silena Beauregard, sitting next to her boyfriend. In front of them sat to other demigods. One of them smiled - it was Lee Fletcher, the Apollo child who died in the battle of the labyrinth. Nico didn't recognize the other one. Silena waved to him, and he walked up to the group of four. He sat down next to Silena, who suddenly had a concerned expression on her pretty face. 'Did you die as well?' She asked. 'No,' Nico replied, 'I am just visiting my father and I got bored. So I decided to take a walk.' Silena nodded, and so did Beckendorf and Lee. The fourth boy looked at him. 'You are a child of Hades? Did he break his vow as well or did I miss something?' He asked. Nico looked at him weird. 'I thought most people knew that I was a child of Hades. When did you die? It can't be in the battle of the labyrinth, since I used skeletons there...' 'I did die during that battle. Maybe I died to early.' The boy looked kind of sad. Nico coughed. 'Well, I might have an idea. It might be a bit against the rules, but it might be entertaining. So, what if we took Cerberus for a walk in the Underworld?' Nico looked at the other, dead demigods with a weird smile on his face. Selena's face lit up. She clapped in her hands. 'Yes! That will be funny! You guys are coming too, right?' She looked at the boys with the biggest puppy-dog eyes she could make. That wasn't necessary, because all of them almost nodded their heads of. The boy Nico hadn't recognized stood up and shaked his hands. 'My name's Castor, son of Dionysus. You sound fun. Let's go to your father's dog.' The other three got up, and Nico took them to the entry of the underworld.
Cerberus was still sitting in his usual place, being as scary as ever. But when he saw Nico, he barked happily. The barking was so loud that the roof shook. A few ghosts screamed, but Nico didn't pay attention to them. 'Aren't you four scared?' He asked the four demigod's behind him. They gave him weird looks. 'Nico, we are already dead,' Lee Fletcher reminded him. 'Right,' Nico said. He walked towards Cerberus. 'Now, don't speak or walk to loud. If the judges notice us, the entire plan will go wrong. He nodded towards the judges of death: Minos, Aeacus and Rhadamanthus. 'They look kind of scary,' Lee said. Nico nodded. 'They are scary.' He got a leesh of the wall behind them, and climbed on Cerberus's back. He hooked the leesh on it's hook, and slided down Cerberus's back. 'Don't worry, the leesh is magical,' he whispered. He put his hand against the wall, and a secret door opened. He waved to his friends. They all stepped through the door, and stepped out in another underworld meadow. 'This is Cerberus's walking park,' Nico explained. The dead demigods gulped. It was bigger than all of their villa's in Elysium combined. It was almost bigger than the entirety of Elysium. Nico let go of the leash, and Cerberus ran around like a puppy. Nico sat down. His four friends did the same. 'She is always a little wild. It's all save, though. Nothing can happe...' out of nowhere, Hades appeared. The four dead souls screamed, and Hades cut his son of: 'Nico, what are you doing with these four ghosts and with my dog?' He screamed, with flames in his eyes. Nico kept a poker face. 'I was walking Cerebus so you don't have to do it. And you should be the one to understand that the underworld gets a bit boring on one's own. That's why I got these four spirits of other demigod's to accompany me.' Hades looked at his tiny-for-his-age son. 'Hmm. I suppose you're right.' He looked at his dog. 'But he had enough exercise.' Hades clapped in his hands. Suddenly, Cerberus was back in his place, and Nico was standing in the throne room, with Silena, Beckendorf, Lee and Castor behind him. 'Go to your room. And take your friends with you, because I don't want you to be lonely and attempt dangerous things. Nico walked to his room, followed by the ghosts. He turned around and looked at them. 'So. You guys have something interesting to tell?' Nico asked, as he fell down on his bed.