The annual Christmas is here again. The whole family is busy going out to celebrate the Christmas holiday, but unexpectedly, they make a mistake and leave the youngest member of the family, 8-year-old Kevin (Macaulay Culkin), at home. Mom and Dad are very worried, but they are already out of town at this time and can do nothing about it. Kevin is very happy. It is rare for him to be alone at home, so Kevin decorates his home into a "playground". Two thieves who have just been released from prison set their sights on Kevin's house. When they sneak into Kevin's house, Kevin uses his eye for space and the "playground mechanism" at home to play a "game" with the two stupid thieves, which is full of jokes. Can Kevin win this "game" in the end?