Sky and Sophie knew they were the perfect couple from the start. They were always there for each other. But when Sky finds out Sophie invited her three possible dads to their wedding without telling him or Donna (Sophie's mother) about this Sky gets ticked at her but the wedding still must go on.
Sophie gets to know her three possible dads Harry Sam and Bill after they tell her Donna saw them and told them to leave. Sophie fixes everything and makes them stay. Sophie and Sky end up not getting married and they decide they want to get to know each other and explore the world together.