A woman who has an elaborate scheme to propose to her boyfriend on Leap Day, an Irish tradition which occurs every time the date February 29 rolls around, faces a major setback when bad weather threatens to derail her planned trip to Dublin. With the help of an innkeeper, however, her cross-country odyssey just might result in her getting engaged.

The story follows Mirabelle, a disenchanted salesgirl and aspiring artist who sells gloves and accessories at a department store. She has two men in her life: wealthy divorcée Ray Porter and struggling musician Jeremy. Mirabelle falls in love with the glamorous Ray, and her life takes a magical turn, but eventually she realizes that she must empower herself and make a choice between them.