After an enjoyable day of playing with Oobi and Kako in the mud, Uma objects to taking a bath. She soon learns that bath time can be fun when you add a dance game to bathroom activities. — ABC Television (source)
Uma is walking along when she sees a pile of mud in the garden. She decides to splash around in the mud, accidentally covering Oobi and Kako with it in the process. The boys join her and they all start splashing in the mud. The kids chant "Dirty! Dirty!" and parade through the house. Grampu finds them and can't tell them apart because of how dirty they are.
Grampu brings the kids to the bathroom and gives the boys a bath. He offers to give Uma one too, but she wants to stay dirty and refuses to step inside the bathtub. She runs away into the kitchen. When Grampu catches up to her, Uma tries to convince him that she is clean by wearing a towel. Grampu pulls the towel off, revealing that she is still covered in mud. She runs off again and Grampu chases her, laughing.
Uma agrees to go in the bathroom and tries to stall by using the toilet and washing her fingers in the sink. She sees herself in the mirror and pretends to be a monster. After this, Grampu asks her to get in the bath again. Uma is hesitant, but she finally decides that it must be done. She climbs into the tub and sings a song about bath time. When she finishes washing up, Grampu is relieved that Uma is clean. However, he notices a trail of mud-covered handprints on the bathroom wall. He sighs and starts to clean them up.
The next scene shows Uma playing a bath-themed dance game. She teaches the viewers three moves: flushing the toilet, washing up, and drying off. Uma is interrupted prematurely by Oobi, who explains that he needs to use the bathroom. Oobi says goodbye to the viewers as the episode ends.