Tomás, an 11-year-old boy living in his own fantasy world, must use his vast monster knowledge to fight against his new English teacher: a wicked woman who is, in fact, a child-eating monster.
For the sake of the family, Vyacheslav Lazarev left the big aviation. The usual routine of Lazarev and his son Kolya is disrupted by a small bear cub, huddled in the cockpit of one of the planes. Little Mansur - as Lazarev and the others called him - having escaped from poachers, becomes attached to Lazarev.