Donald Duck rides Jenny the donkey through the Mexican desert playing a guitar and wearing a sombrero on his way to the house of his girlfriend, Donna Duck. Donna dances the Mexican Hat Dance and eventually lands on Donald's donkey who throws her off his back. Donald laughs causing Donna to get angry. She knocks Donald into a fountain, breaks his guitar over his head, and storms back inside the house.
Back outside, Jenny laughs at Donald's misfortunes. Donald decides to exchange Jenny for a car at a nearby trading post.
Donna is immediately won back with Donald's car. She lands in the rumble seat and gives Donald a big kiss. Together they speed off through the desert, but eventually the car has engine problems and stops working. Donald confidently tries to fix the problem but the car suddenly goes out of control; the rumble seat closes on Donna and she is trapped inside as the car throws Donald out and speeds off without him, with Donald in pursuit. The car crashes, throwing Donna out of the rumble seat, across a waterhole, and into a mud puddle, and Donald laughs at her. Donna, furious once again, grabs the car's horn and hits Donald with it, until he lands in some cacti and Donna shoves the horn in his mouth. Donna then rides off on her unicycle which she has conveniently carried with her in her purse, and declares their relationship over.
Donald, alone in the desert with Jenny who has escaped from the trading post, is furious at the car and throws the horn at it in retaliation. This, however, causes the car's radiator to explode and the hot water lands on Donald's sombrero, shrinking it in the process. Jenny laughs at Donald yet again, ending the cartoon.