The opening in the forest before them was an eerie jumble of shapes and shadows ...Roland and Oswald strained their eyes .. finding imaginary monsters in the bulky bushes and arching tree limbs. Then they saw a real one. Somewhere in the future a scientist is conducting the experiment of his life -- stretching time to bring a living dinosaur to the present. But the giant prehistoric beast is stranded in the Middle Ages. There, a boy desperate to be a knight and his unwilling brother must face their fear and do battle.