Sophie has a dream of meeting her father. Since her wedding is right around the corner, she decides to try and find him. She stumbles upon her mothers old diary and finds 3 possible men that could be her father. She decides to invite all of them to her wedding.
Sophie and Donna both have invited their 2 best friends. Donna's friends arrive on a boat and meet her at the dock where they are so happy to see each other. At the same time, Sophie's friends arrive and they do their famous handshake to celebrate their reunion.
The next day Sophie tells her friends that she has invited her dads to her wedding and that she plans to choose one of them to walk her down the isle. Also, she tells them that they are arriving that day but they've got to keep donna out of the way. As the 3 men arrive on the island Donna spots them and has a panic and asks them to leave.
Sophie sees the three men leaving but stops them before they go, and persuades them to stay for her wedding. Sophie's wedding is in a few days and everything is starting to come together. Sky, Sophie's husband to be , found out about her possible dads, and they have a argument about it. The tension is high.
Meanwhile, the three men have all asked Sophie if they can walk her down the aisle and she nervously said yes to every one. She is confused and anxious, still not knowing who will walk her down the aisle. Later that day sophie has her hen night with her friends and family, but its invaded by sky and all his male friends.
The wedding day has come, and the island is being set up and prepared for the big day. Sophie is upset and asks her mum to help her get ready, they bond over old photos and set of on the journey to the church. Donna is late for the wedding leaving everyone waiting for her. When she finally gets there she walks Sophie down the aisle and the ceremony takes place.