Complete with one word

Milo is a young scientist. He works at a very important museum in Washington. He studies maps and old books. He is very intelligent and he loves adventure.
One day, he finds a very old book with special maps.
“Oh! This map is really important! It is Atlantis!” He is very happy and goes to see the director of the museum. He wants to find a treasure and be famous, but he hasn’t got money for an expedition.
“Sir, I think I can find Atlantis with this book and map. Can the Museum give me the money for the expedition?”
“Of course NOT! The Atlantis is not real! We haven’t got money for stupid expeditions”.
“I’m sure it’s real”, thinks Milo.
He’s sad. He can only study books and maps, not real places.
On the next day…
“Good morning Milo. How are you today?”
“Good morning, Helga. I’m not happy. The museum doesn’t want to pay for my expedition, but I’m sure there is an island called Atlantis under the ocean”, says Milo.
“I can help you.”
“ Can you?”
“ Yes Milo, I know rich people who can give you the money for your expedition. Do you want to meet them?”
“Yes! When can I go to see them?” asks Milo.
“Let’s go tonight.”
“That’s fantastic.”