Young travelers adventurers: Walter and Diana are constantly searching for unexplored places on the Earth's map. It seems to you. That there are no white spots, but maybe there are no large ones, but there are many small ones. And one of these is located on a lake with the strange name Brilliant. This is a huge reservoir, even having islands, and one of them was very interested in our heroes. It is not even on any map, which is unusual, because the lake has been examined along and across. Friends go to the island and you hurry up to enter the Secret small island game to join their expedition. She promises to be fascinating.
