Comedy legends Billy Crystal and Bette Midler play Artie and Diane Decker, who are called in by their daughter (Marisa Tomei) to help care for their three grandkids. When their old school methods of parenting collide with their grandchildren's' new school and hyper-scheduled way of life, the once-orderly household spins out of control, and Artie and Diane must employ some unexpected tactics, including a new parenting style for themselves, to help teach their grandkids how to actually act like kids.