An eight-year-old boy's family is in a frenzied rush to depart for their Christmas vacation to Paris. Amidst the chaos, the boy gets into a scuffle with his older brother and is sent to sleep in the attic as punishment. The next morning, the family inadvertently leaves for the airport without him, and he wakes up to an empty house, initially relishing in his newfound freedom and independence, believing his wish to have no family has come true.

The excitement of being alone quickly turns to challenge as the boy discovers two bumbling burglars are planning to rob his house on Christmas Eve. Using his wit and the resources within the home, he sets up a series of elaborate traps to fend off the would-be intruders, all while navigating the daily tasks of looking after himself without the assistance of his parents or siblings.