Mamma Mia! 3 picks up several years after the events of the second film, as Sophie has fully restored and reopened the Hotel Bella Donna. Now a mother herself, she is balancing family life with the pressures of running the island retreat. When she receives an invitation to a major international music festival, she’s torn between staying grounded and honoring her mother’s free-spirited legacy.
Sophie decides to turn the hotel into the festival’s surprise venue, inviting her three dads—Sam, Harry, and Bill—as well as old friends from Donna’s past. As the island comes alive with rehearsals, laughter, and music, long-buried emotions resurface, and unexpected guests begin to arrive—including a mysterious young woman who may have a connection to Donna no one saw coming.
Meanwhile, Sophie begins to question her path. With pressure from investors to commercialize the island and tension in her relationship, she wonders whether she’s truly living the life she wants—or the one she thinks her mother would have wanted for her. Her journey is echoed by the younger generation, who are now experiencing their own romantic entanglements and identity struggles.
As the music festival begins, secrets unravel: a lost love from Donna’s youth, a surprising revelation about one of Sophie’s dads, and a heartwarming twist that brings closure to the past. With the power of ABBA’s iconic songs—both beloved classics and deep cuts—the film explores love, legacy, and choosing joy even in uncertainty.
Mamma Mia! 3 ends with a spectacular beachside concert, uniting generations under the stars. Sophie steps into her own power, embracing both her roots and her future. The story closes on a note of celebration, as the island, once again, becomes a place where music, family, and love come together in perfect harmony.