We enter the small diner at the end of the street per request of the letter that was handed to us, or at least we thought that's what the letter meant since it only has 'Mama Sunday's Diner' written on the letter and nothing else.

Right above the entrance door, there's a blinking red sign of the diner's name. The diner looks normal, and ordinary. It has tables and sofas lined up next to the glass wall with a view of the street. Written on the glass wall is the diner's name written in red transparent letters. There's a bar at the other side of the glass wall, lining up chairs against the bar. It looks pretty standard, except that no one is here at sight.

Then again, somehow almost all of Washington is empty. The white house was empty when we got there, the president wasn't there, the secret service wasn't there. Even during our walk to here we found no one at sight.

It makes sense considering that a hundred fifty people gathering on the lawn of the white house and still no one is around to look at us like we're a bunch of crazy people. On a normal day where people are around that's definitely going to happen.

Still, someone must have sent us that letter, and that someone wants to meet us. Now that we're scanning around the room, there IS actually someone here. One person is sitting at the bar eating his lunch, a large chicken burger with a side of French fries and coke.

It's pretty clear that he knows we're here, it's not like we're sneaking in anyway or something like that. Besides, the small bell above the door that rings everytime someone comes in is already enough to alert the mysterious person of our presence.

The man that's sitting at the bar has long black hair that falters to his shoulders, it looks a bit wet, his hair is pushed back completely revealing his face clearly. He has oceanic blue eyes and a young face, probably around the age of seventeen. He's wearing a bronze chainmail with long blue jeans with an aquatic gladius and an aquatic round shield strapped to his back.

'Took you all long enough.' The boy says while munching his hamburger. 'I've got to say, I had my doubts about this place but this burger is fantastic.' He grins.

Thalia holds out the letter on her hand. 'Were you the one that sent us this?' She asks.

The boy licks his hands clean, 'Yup, I did that.' He stands up and faces us. He's around 5'10" tall. 'So, should we begin then?'

I raise my eyebrow in confusion, 'Begin what exactly?'

'You're a son of Poseidon.' Thalia says.

He tilts his head, 'Haven't we established that already?' He looks to me, 'And as for your question, I mean begin fighting already.'

Thalia and I ready our weapon. 'If it's a fight that you want, then we'll be happy to oblige.' Thalia says.'

The boy holds out his hands, 'Whoaa, easy there girl. I didn't mean fight me.' He smiles playfully, 'I mean fight Yukimura's army.'

'Yukimura..?' I ask, still having my guard up.

He shrugs, 'My brother, you know, another son of Poseidon. He's the leader of the opposing army, and right now they're already nearby.'

'We know that, so what do you want from us?' Thalia glares at him, ready to maul like a Rottweiler.

He sighs, 'Geez, this is the welcome that I get from being the good guy? You're welcome.' He says, but his words only put us in an even more confused state.

'Stop playing around and tell us!' Thalia growls impatiently.

'I'm here to help you, duh.' He answers.

'Help us do what exactly? Last time we encountered a brother of yours, we ended up in a giant birdcage!' I say.

He rolls his eyes, 'To bake breads and cakes! Gods almighty, I'm here to help you in your war! I'm here to fight by your side, what else could it possibly be?'

Thalia and I glance at each other with disbelief, and then we stare at him with the same emotion.

'You don't trust me one bit, do you?' He talks to both of us.

'Nope.' I answer.

'Not even a little bit.' Thalia follows.

He sighs, 'I knew this would happen, that's why I told them that there's no way you guys would go with this idea. Look, believe what you want to believe, but I'm here to help you guys. Honest. The primordial gods thought that it's a bad idea or rather, it's unfair for you guys to face Yukimura without any backup, I mean, forget the army! He's bringing a pretty big weapon, and right now, it's facing this way!' He examines our unchanging expression, 'But you already knew that.'

We do, Selene showed it to us. The biggest and most terrifying looking monster that we have ever seen in our life. I'm not even sure what to make of what we were looking at when Selene showed us. It looks so simple, an ordinary snake, but the monster vibrates bad news from all over its skin. Our bodies produced fear just simply by looking at its image.

Thalia stays silent for a couple of seconds before dropping her guard. 'Thalia!' I whisper cautiously.

'The serpent you mean.' Thalia says.

The boy nods, his smile fades, 'Ophion , the primordial serpent, now the most dangerous monster out there.'

'How can we be sure that we can trust you?' Thalia asks calmly.

'Thalia!' My tone is clear on disapproving this.

The boy shook his head, 'You don't really. But what other choice do you have? If it helps, my life is on the line too. If you guys fall, I'll die with you. Is that enough assurance for you two?'

'And your brothers are just okay with you revolting?' I ask.

'I'm not really revolting or anything… This is the idea of the elder gods. Besides.' He smiles, almost sadly. 'I really don't have any beliefs in our cause to begin with.'

'What's that supposed to mean?'

'It means nothing, now are you going to let me help you or should I just let you fall to your demise?' He pauses, 'Of course, that would mean my demise too.'

Thalia thinks, it looks like she's considering.

'Matt, lower your weapon.' She orders.

'Thalia, are you sure? This guy can't be trusted.' I try to convince her.

'I didn't say that we can trust him, but he's right, we do need help if that serpent thing is coming our way.' Thalia says firmly.

She's right though. He was an enemy, probably still is, but right now we can use his knowledge about this whole war and how to defeat his brother's weapon, or rather the primordial gods' weapon.

Besides, I don't know why but I can tell that he's not lying and I'm pretty sure Thalia can tell too.

'What's your name?' Thalia asks.

He smiles, 'Nathaniel Hail. But call me Nathan.'

Before we can reply, the roof shakes, almost like it's going to collapse. But then I realize that it's not just the roof, the entire place is shaking. It's an earthquake. I'm about to panic but suddenly it stops without any notice.

I look to Nathan, his face is grim. 'They're here.' He says.

I sigh, readying myself. 'Here we go.'