Once a mail ship, sailing at night, collided with the state border of the island of Lascania, and Lucas the driver came up with the idea of putting a lighthouse on that island. But, since Lascania was a very small state, the lighthouse had to be both large and small, and this is impossible. And then Jim Button came up with the idea of bringing Tur Tur, an imaginary giant, to the island to serve as a lighthouse at night. On their steam locomotives, friends set off across the sea to visit the giant, not even knowing how many adventures await them on this journey. Source: