Penny's family comes to visit on the occasion of her sisters wedding, and masculine minded Sam has to be the daughter/sister instead of Penny, to Sam's annoyance and Penny's disappointment.
But when her father threatens to skip the wedding, Penny, still stuck inside Sam's body, has to break through her father's reservations about his son-in-law and show him the error of his actions regarding BOTH his daughter's choices in spouses.
