It's the day of Bell and Reuben's wedding and Charlie is facing her own trauma – wearing a dress. But as the girls get ready at the house the boys find themselves locked in Reuben and Bell's first floor flat with no escape as time ticks on. To top it all Reuben still needs a best man and Fergie and Fraser are battling for the position. Meanwhile Granddad comes face to face with Molly's husband and Gravy confronts the truth that's been playing on his mind for weeks.