Grandmother flies in on her spaceship to visit her grandchildren. Mimi shares her experience with her: someone stole the ice cream. Together with the children, the old woman goes in search of mysterious monsters who stole the delicacy. Along the way, the children catch the huge shadow of a small dog, save the playground administrator from sadness, find out what wonderful animals live in the neighboring park and find a melted snowman who gives them a solution to the case. The ice cream has melted! The company returns home to their parents, savors the details of the adventure and enjoys a portion of the delicacy, which now certainly will not go to waste.