All her life the forest had been Laura's best friend - and suddenly, overnight, she became an evil, treacherous, cruel enemy. And how can you say otherwise, when a whole cloud of birds circles above the trees with an ominous squawk, when vile bats swoop down on people, and a terrible unknown creature plunges sharp fangs into you! Only her own father, the local Aibolit, who knows the forest inhabitants like the back of his hand, can help Laura, but lately he has become somehow strange. “He knows something about all this,” Laura thinks and decides to break into the mysterious barn where her father disappears for days on end. With a sinking heart, she opens the door to the unknown and with a trembling hand...