Morty falls in love with an ecological heroine named Planetina, and quickly has trouble with the people that created her. Rick and Summer visit planets that are about to stop existing to have crazy parties and forget their problems.
Morty has the idea to use a horse breeding mount to extract his semen, but after Rick tries to use it to create a weapon, thinking it was horse sperm, he ends up creating sperm monsters that threaten the entire country.