Bastian Kollinger is looking forward to the Christmas season with his parents. He can't wait for the powdered sugar cookies, Schierbecker Pils, and the crackling tiled stove. However, he hasn't yet confessed to his mother that he will not be spending Christmas Eve with his own family, but rather with the somewhat difficult parents of his new girlfriend, who insist on meeting him right during the gift exchange. As if that weren't enough, unexpected guests have also announced their arrival at the Kollingers' over the holidays, which will make Bastian's childhood home feel like it's bursting at the seams.