"What do you know about your grandparents?" Is the continuation of the hit comedy from 2015. This time, father Dusty (Mark Wahlberg) and stepfather Brad (Will Ferrell) join forces to show their children what the perfect Christmas is. But their newly formed friendship is being tested when their fathers come to visit: Dusty's old-fashioned father, Macho's grandfather (Mel Gibson) and Brad's father - a sensitive, affectionate, warm, typical old-fashioned grandfather (John Lithgow) . These holidays will be chaos ...