Located atop a hill in old San Juan, Puerto Rico, the Convent San Tanco is populated by, among others, Sister Bertrille, a new novice from New York, who is to teach kindergarten, but discovers that the strong winds of San Juan coupled with the wing-like cornette of the nun's habit can make her go airborne.
Sister Bertrille tries to explain her flying ability to Carlos.
Sister Bertrille goes to a greedy car salesman to get a new station wagon for San Tanco.
Sister Bertrille and Carlos try to salvage the convent's bell from the ocean.
Rumors of Sister Bertrille's imminent demise lead to a conspiracy to brighten her last days.
A psychiatrist pays a visit to San Tanco.
Sister Bertrille and Sister Jaqueline try to hide a bird in the convent.
A hit man's girl poses as Mother Superior's secretary, but makes friends with the Sisters.
To raise money for the convent, Sister Bertrille and the others try to market sea grape juice under the title ""Nector of San Tanco."" But, however, they get more than they bargain for.
After helping a pelican on the beach, Sister Bertrille has to cope with a lovesick bird.
When Mother Superior goes on a business trip in Saint Thomas, Sister Bertrille uses her powers to give Plaseato something very important that she forgot. When the wind dies down, she lands on a small island where some gamblers are staying.
When she and Sister Jaqueline volunteer at a hospital, Sister Bertrille befriends a boy with a knack for telling lies. The boy sees Bertrille flying, but no one else believes him!
Sisters Bertrille and Jaqueline try to stop a civil war between the village of Santa Thomasina.
After a day picnicking, the gang are ready to head back to the convent, however their station wagon isn't being cooperative. Sister Bertrille decides that she will fly to a pay telephone and call Carlos to come pick them up. But the stormy weather grounds her, as her cornette becomes sopping wet and limp.
When looking for rocks, Sister Bertrille gets stuck in a mine with an ex-con.
After pulling the name of an elderly nun from the Christmas grab bag, Sister Bertrille tries to make it snow. Even though her intentions are good, all goes wrong.
A clumsy brother comes to the convent to help with the library.
A little boy believes Sister Bertrille is his mother.
Sister Sixto's uncle uses Sister Bertrille to help him catch fish.
A hot spell is drifting through San Juan, and with it comes gangster Rufus Morgan, who has vowed to take over Carlos' casino.
Carlos falls for Sister Bertrille's sister.
A gambler thinks Sister Bertrille is good luck.
Sister Bertrille helps a sailor who plans on going from San Juan to Miami in a tiny ship.
Pedro Alvarez and Juan Cortez are business partners of a produce business, Juan the business oriented partner, Pedro the customer oriented partner. When Pedro reveals he is illiterate and can't read a letter from his girlfriend in Miami, Sister Bertrille suggests that he learn to read and write.
When a lonesome Jewish girl comes to stay at Convent San Tanco while her parents are away on vacation, Sister Bertrille takes on chief babysitting duties--and perhaps goes too far in the Big Sister department before little Linda Shapiro announces she wants to become a nun too.
In the will of a benefactor, the convent is the sole beneficiary of the estate. Unfortunately the only asset of the estate is the contract of a boxer, the Buffalo Buzzsaw aka Mike Sever.
Carlos is doing his mandatory two-week active duty with the marine corps, and is stationed on a small remote island near San Juan.
Bridgett Faulkner and Joel Bascomb reluctantly accept their prizes donated by Carlos Ramirez as the top students at the convent, the award being a day out on the town and dinner at the Captains Table.
One of the convent children takes an interest in Scraples, a kleptomanic dog.
Sister Bertrille, Carlos, and one of Carlos's girls are stranded on a desert island.