Dr Tess Coleman and her daughter, Anna, are not getting along. Anna is incensed that her mother doesn't support her musical aspirations and Tess, a widow about to remarry, can't see why Anna won't give her fiance a break. Their Friday turns freaky when Tess and Anna awake to find themselves inside the other's body. Now, Anna must go to work as a psychologist and plan her mum's wedding while Tess must survive a day in high school and perform with her daughter's band. But with the nuptials less than 24 hours away, the two have to find a way to switch back ... and fast.