Bill & Ted's fathers make it clear that they are not getting any more advances on their allowances, leaving the dudes with a most serious low cash flow crisis. Rufus meets them at the Kozy Korner where he shows them a Wyld Stallyns hologram which has suffered an electrical glitch and wiped out the sound and he's been sent back to find out what song it is. The dudes want to rehearse but realize that they need money and have to find part time jobs. They apply for work in the food court at the San Dimas Mall, only to find they have no past experience to put on their applications. They decide to go to France to study food and land at the palace of Marie Antoinette, who is in tears because her chefs have quit and there is no one to bake her birthday cake. Bill & Ted offer to bake the cake in exchange for a recommendation. Outside they find Jacques and Joseph Montgolfier working on blowing up their hot air balloon and ask if they can borrow their fire to bake their cake. The balloon gets away from them and snatches up their phone booth, taking Bill, Ted and Marie Antoinette on a ride. Seeing the masses of people below, Marie thinks they are an admiring crowd and throws them some of her birthday cake, saying "Let them eat cake!" She writes a recommendation in the frosting of the cake and they head on to their next destination. They land in Venice, Italy, where they get jobs as gondola taxi hacks. Their first passenger is Lucrezia Borga, who is running away from her father to meet with her secret lover, who chases after them. When their gondola is swamped by a larger boat, they escape by using the phone booth as their gondola instead. Lucrizia asks Bill & Ted to sing her message to her lover, Antonio, and he comes down to meet her. Her father finds them and chases after the dudes again, who disguise themselves as fish mongers to escape. Lucrizia is grateful to them for helping her escape from her father and gives them a recommendation as well. They next travel to Northern Mexico where they meet up with Juan D'Onote on his search for the Lost City of Gold, who is impressed they could find water in the desert (their booth was full of water from the Venice canals). They are given jobs as scouts, but the previous scout is angered and threatens them with violence for taking his job. An Indian arrives and shows that his people already live in the Lost City of Gold. D'Onote claims the land and comes up with the name Santa Fe. Bill & Ted are chased off by D'Onote's former guide, but are helped in their escape by the Indians. They next land in a Japanese barber shop where they meet samurai in training Matsu Basho, who would rather write haikus than cut hair. Bill & Ted find Basho's haiku's too depressing and write their own enthusiastic one. As they sing, they cut a samurai's hair for him unevenly and put it up into a bun instead. Basho's father is happy with the new style and congratulates his son. Back at the San Dimas mall, Bill & Ted are offered jobs at the Geisha Grill, but spotting someone they think is the samurai they run off before they can take the jobs (it turns out it was only the Grill's cook). Rufus drops in on the boys again to see how things are going, and Bill & Ted say they have learned working is hard and they will be more careful with their money. They also play their new haiku for Rufus, who is thrilled when he realizes they are the missing lyrics he's been looking for.
The misadventures of two time-travelling slackers as they travel into the distant past and future.
