Ten-year-old Alex and his nine-year-old sister Katie are on a mission to save a young man named Emelya who is imprisoned by an evil tsar. Alex and Katie rush to the rescue. When they stop by a log cabin to ask for directions, a creature in a sheepskin's coat with green furry hands opens the door. His emerald eyes shine a bright green light right at Alex and Katie. Is he a friend or an enemy? Will Alex and Katie find Emelya? Will they return safely to Aunt Karina's house?