Eight-year-old Kevin is accidentally left behind when his family leaves for France. At first, he is happy to be in charge, but when thieves try to break into his home, he tries to put up a fight.

Kevin accidentally boards a flight to New York City and gets separated from his family who are on their way to Miami. He then bumps into two of his old enemies, who plan to rob a toy store.

A married couple triy to steal back a valuable heirloom from a troublesome 10-year-old kid while his parents are away.