Students in fourth through eighth grades at St. John’s Catholic School will stage “Once Upon A Leprechaun,” a musical comedy, at 7 p.m. today and Saturday, as well as at 2 p.m. Sunday, at the school on Pleasant Street.

“When a trio of wild and crazy leprechauns try to help tongue- tied shepherd Fin O’Grady learn to tell a story, they help him win the hand of his one true love,” a plot summary from the school states. “Assisted by the wee folk of Ireland, Blather, Blarney and Balderdash enact ‘ The Hunchback of Knockgrafton,’ in which a simple man’s gentle nature wins him an unexpected prize and a cruel counterpart learns that it’s not a good idea to mess with little people.

“In ‘The Griffin’s Feather,’ young Aidan bravely encounters a sneezing girl, a frenzied farmer and a bombastic boatman before snatching three feathers from a hen-pecked griffin in order to cure a sleeping beauty.

“In ‘The Bird, the Mouse and the Cricket,’ a courageous lass and three magical animals risk their necks to help a sour prince regain his lost laughter. At last, the shy Fin discovers that a story is a treasure that increases the more you share it. He thanks his lucky charms that he came upon the leprechauns.

“ This uplifting, comic musical glitters like a gem with its peaceful Celtic melodies, clever dialogue and slapstick humor to inspire many a chuckle in the wee as well as the old.”

Henry Eichmann, president of Midcoast Youth Theater, directs the production.

St. John’s parent and artist Courtney Giovinazzi of Bath designed and painted the sets. Set construction is by Mark Parker.

Tickets cost $8 for adults and $ 5 for seniors and students. They will be available at the door. The play will take place in the basement of St. John the Baptist Church, 39 Pleasant St.