When the family arrives back from a trip to Pakistan with Mr Khan's mother-in-law in tow, Mr Khan is lumbered with looking after her. Then a miracle happens - she announces she wants to move into a home. When Sam - the head of a local care centre - arrives, Mr Khan is over-the-moon. That is, until he discovers the mother-in-law may be worth some money. With the help of son-in-law-to-be Amjad, a ridiculous disguise and a spying mission, Mr Khan tries to stop Naani moving out at all costs.