I am Willi, the wind-up mouse. You wind me up and let me run in circles. You press and kiss me. Everyone loves me. Oh, if only Alexander were like his friend Willi, who is loved by all as a toy mouse! Alexander would most like to be transformed into a wind-up mouse by the mysterious lizard in the garden. When he finally gets close to his goal, he finds Willi in a box - along with other toys that are meant to be thrown away. But if the lizard can turn Alexander into a toy mouse, isn't it also possible for her to turn Willi into a real mouse?.