On the Greek island of Kalokairi, Donna, an independent hotelier, is preparing for her daughter's wedding with the help of two old friends. Meanwhile, Sophie, the young bride-to-be, wants her father to walk her down the aisle. After having discovered her mother's old diary - which describe intimate dates with three men (Sam Carmichael, Bill Anderson and Harry Bright) 20 years ago - Sophie sent each an invitation to her wedding, writing in the name of her mother. The arrival of the men from her past is a surprise to Donna. Nothing goes right for Sophie who had hoped she would know her father the moment she saw him, but is now only confused.
The more Sophie and her mother struggle to find truth and understanding, the more it threatens to tear them apart and wreck Sophie’s dream wedding.