Don Matsugoro and his son Don Jr fight against a disgustingly reach family who tries to take over a kid's playground called Children Land.

His goal is to help the weak and defenseless, but his saving a mouse makes him the most wanted in all the land. On the run from incessant, dim-witted mice, Perro befriends a young miller's boy, Pierre; together, they decide to seek fame and fortune. When they cross paths with the lovely Princess Rosa, Perro determines to get Pierre hitched to Her Royal Highness.

Director Ogata discovers a new female star in Koharu Tanaka, who works selling candy at a studio theater and she is given a part as a bit player. After the studio's top leading lady is embroiled in a scandal, Koharu is suddenly thrust into the limelight when she replaces her in a film and gains instant fame and fortune. But the going is not always easy, and she soon seeks help from unexpected quarters.