Planet Express faces foreclosure and to raise money, Professor Farnsworth, Fry, Bender, Zoidberg, Hermes and Scruffy take advantage of a contract clause to force Leela, Amy, and LaBarbara (who was recently hired) to pose for a pin-up calendar.
Both groups realize they can create a cooler from Bender's gas compressor, and the freon coil of a refrigerator fembot named Amana.
Back at Planet Express, Leela, Amy and LaBarbara don't like being men while Fry, Bender, Farnsworth, Hermes, Zoidberg and Scruffy love being women—as their company is still facing foreclosure, the women-turned-men take advantage of the contract clause to force the men-turned-women to pose for the calendar.
They manage to sell enough calendars to save Planet Express and while celebrating, the rock alien's friend, the Borax Kid, arrives and restores everyone to their correct genders before leaving.
An original ending involved Amy's parents, Leo and Inez Wong, purchasing Planet Express and saving it from foreclosure.