The charlatan and the pilgrims (A story dream)

I had what I like to call a "story dream" it's almost a fully formed story and I'd like to share it here. It will have the nonsense of dreams included. 

The world is ending. Catastrophic floods are only weeks away. A group of religious zealots have overtaken an island where they have built a theme park to celebrate their jubilation at the end of the world. They are led by a man, a charlatan, who is more home shopping network salesman than the leader of the chosen few. He has promised his people that a he has had a vision of a grand pilgrimage of a select handful and they will deliver the final piece of the puzzle: the holy grail (not actually sure if it was THE holy grail or something equivalent).

Hidden in the wilds of Peru is a fabled ancient city, and in it is hidden the treasure. So, the charlatan gathers up the youngest, most devout, of his number. There's only five of them, but one is his hidden secret, her name is Monday. The only reason he has gained such power is because of her, and he hopes that because of her their pilgrimage will not fail him.

"How can we survive this journey with only five of us?"
"Not to worry," says Monday and before the other four divides herself in to seven separate parts. Each named for a day of the week.

So Monday could split herself into seven different people with distinct looks and personalities, but other than that she never really had any effect on the story. It was just a thing that was.
So they began a pilgrimage across the sea towards Peru where the holy grail awaited them.
Across the sea, across the land, through cities that were increasingly empty and devoid of human life, to forests that were teaming with animal life (probably because they didn't know any better)

Finally they reached Peru where the lands were already flooded and the boat they commandeered drove them through rivers that had buried towns. They looked over the edges and saw houses just fifty feet below, now inhabited by fish.

Many of the people in Peru already knew of the coming disaster and seeking the holy grail too were moving in masses towards the mountain where it lie.

Through more jungle where they joined a group of Peruvian pilgrims, they climbed the old steps of a forgotten ancient city, up and up and up until they could see all the land around, clouds flying low and filling the trees with fog.

They reached the center of the city and and when they searched and asked about the holy grail everyone just said: "It is here. It is here."

But they couldn't understand, there was nothing here except an old city.
They wasted away the weeks, the catastrophe drawing closer, trying to find the holy grail in the city, but it wasn't until they began to understand the words of the Peruvians around them that they began to understand that the CITY was the holy grail.

"What do we do now?" one of Monday's seven asked.

"We cannot return, the catastrophe is only three days away."

So it happened, the world flooded and there was no way to tell what happened to anyone else on earth. 

Did they make it to high ground?

They had to begin a new life.

The end!