Two friends, Kim and So, start their Italian vacation after a series of events, including missing their flight and being upgraded to business class, where they meet a mysterious Italian billionaire. They later discover a woman on the plane is obsessed with the billionaire.
Upon arrival, the friends try to rent a villa but are unsure which one to choose. They then go shopping, where they encounter overpriced souvenirs and a vampire. They also visit a museum, where a painting has been stolen, and try to figure out who the thief is.
The friends later find themselves in a room with two doors, each leading to a different outcome. They must figure out which door to choose by asking a question to one of two guards, one who always tells the truth and the other who always lies.
Here are the key facts extracted from the text:
1. Two friends, Kim and So, went on a summer vacation to Italy.
2. They bought cheap plane tickets, but arrived at the wrong airport.
3. They had two options: take a $100 high-speed train to the right airport or buy $400 flight tickets.
4. They met a mysterious old woman with a "zombie" face on the plane.
5. The girls were offered to fly in business class, where they met three people, including a famous Italian billionaire.
6. The billionaire had a gold Rolex watch and designer shoes.
7. The girls played a game with the billionaire, where they had to find food in one of three boxes.
8. The girls won $5 million in the game.
9. They landed in Rome and went sightseeing, but their passports were stolen from the safe.
10. The police questioned three suspects: the boss, the cleaner, and the gardener.
11. The girls went shopping, but were offered expensive souvenirs by sellers trying to take advantage of them.
12. The girls found a basement with three doors, one leading to a time portal to the Middle Ages, one with an evil mummy, and one with a laser alarm system.
13. The girls chose the door with the mummy, but didn't disturb her.
14. A crowd of reporters was gathered around the museum, where the most expensive painting had been stolen.
15. The police questioned three suspects: Giovanni the cleaner, Luca, and Bianca.
16. The girls went to a restaurant, where they saw a vampire among the visitors.
17. The vampire was identified as an old woman wearing sunglasses at night and having no shadow.
18. The girls were trapped in a room with two doors, one leading to a pile of jewelry, money, and designer clothes, and the other leading to being stuck in the room forever.
19. The girls met two guards, one who always lied and one who always told the truth.
20. The girls could only ask one question to find out which door led to the treasure.