Only after losing can people understand how much they need someone. This time, 9-year-old Melo realized the importance of motherhood. Melo lives on the earth, and his mother is very strict with his education. Melo had hoped that his mother would disappear from under his nose more than once. However, when his mother disappeared, he suddenly realized her mother's position in his life. Mello's mother did not hide, but was kidnapped to Mars by a group of Martians, and acted as a "nanny" for the little Martians. On Mars, Melo’s mother would fetch water, mop the floor, wash the laundry, cook, dress the little Martians, and take them to participate in various Martian activities.
Melo was determined to rescue his mother, so he boarded the spaceship by accident, left the earth, and reached Mars. In the engine room of the spaceship, Melo found an earthling named Gribble. He is a technology madman, secretly controlling all the equipment of the entire spacecraft. As soon as he met Melo, he wanted to help the child find his mother. In their "battle" with the Martians, they met Aoi, a rebellious Martian girl, who was willing to help Melo find her mother. Without her mother's discipline, Mellow can do whatever she wants. He finally found that the process of saving his mother was more interesting than the result of saving his mother
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