Mamma Mia It is about Sophie Sheridan and the day before her wedding day. She discovers her mom’s journal, only to find out she has three dads and invites them all to decide which one will walk her down the aisle. Donna, her mother, founds out when they arrive on the island of Kalokairi by going through a full-blown mental breakdown and catching up with her long-lost best friends, Tanya and Rosie. We get taken on a journey of Sophia getting to know the men that are her dads and Donna rekindling her romances.