Rosa tries to open a nut near Pin's house, but all her tries prove worthless. She then goes to Pin's hangar to take some pliers, but accidentally trips and falls into the broken-down Iron Nanny.
Meanwhile, Bibi and Pandy help Pin with his perpetual motion machine, as he tells them that if they take good care of a robot, then it would take care of them in return. Bibi and Pandy find the Iron Nanny with Rosa trapped in it, and assume that she needs to be taken care of. They find spare parts to attach to the robot, but Rosa gets angrier and demands they bring her something to eat. Bibi and Pandy bring her oil, but she demands to bring her something else, after which they decide to charge the robot with some power, electrocuting Rosa.
Bibi and Pandy then say that she has to take care of them in return, but Rosa starts chasing them from inside the robot in a fit of anger. The robot is stopped by the perpetual motion machine, who saws it in half, finally freeing Rosa. As she continues to pursue Bibi and Pandy, she trips, as her nut finally opens... And immediately disintegrates into dust.
