An independent, single mother who owns a small hotel on a Greek island is about to marry off the spirited young daughter she's raised alone. But, the daughter has secretly invited three of her mother's ex-lovers in the hopes of finding her biological father.

Five years after meeting her three fathers, Sophie Sheridan prepares to open her mother’s hotel. In 1979, young Donna Sheridan meets the men who each could be Sophie’s biological father.

Original interviews, rare archive footage and a lot of music, retelling the story of one of the most successful pop groups of all time.