How to learn to love again? There is no single answer to this most important of all questions that life poses. For Alex, the hero of the novel, who loves his wife, but has forgotten how to express his love to her, who loves his son, but cannot understand the child, the answer is found by his eight-year-old son. Alex's Sam is not like everyone else. Living in the world, he is separated from the world. Everything outside of him is a frightening mystery for the boy. But when he gives free rein to his imagination and builds a new world on the screen from cubes, in which there is no place for fear, the life of the boy and his family is miraculously transformed...