the black pearl

Mr. Urban is a sailor and searches for old things. One summer his grandchildren come to visit the village house from the city. His grandchildren are very mischievous and fickle. They decide one day that Mr. Urban will go on a ship trip with his grandfather. Suddenly Some of his work fell during the summer holidays. And his grandson heard that he wanted to go with him but he didn't want to take it. So they sneaked aboard the ship. While the ship was on its way to its destination, some bad guys intercepted them and forced his entire family to bring back the black pearl from the cursed Marma land. If not, he would kill the entire family. Will they still be able to go to that light and save their family?