Mortified follows the imaginative life of Taylor Fry, a twelve-year-old girl living in a beachside town in Australia called Sunburn Beach, as she struggles to make it through her teen years with her flawed and embarrassing family.
Taylor thinks all her prayers have been answered when she is allowed to move in with Brittany's family for a few days. But she quickly realises the Flune family is a well-oiled machine, with strict house rules. She shares her dilemma with Beethoven and realises her own family might not be perfect, but they're perfect for her.
Taylor learns that Brittany and her family are moving house. As Michael and Loretta vacuum their front lawn in preparation for the sale of their house, Taylor and Brittany hatch a cunning scheme to sabotage the open day and ensure that they can remain next-door neighbours forever.