A career-oriented single father and his 11-year-old son are forced to see their worlds through each other's eyes when some Christmas magic switches their bodies. The pair find themselves growing closer as they scramble to figure out the secret of the magic that caused their predicament in time for Christmas.

John Reese, former CIA paramilitary operative, is presumed dead and teams up with reclusive billionaire Finch to prevent violent crimes in New York City by initiating their own type of justice. With the special training that Reese has had in Covert Operations and Finch's genius software inventing mind, the two are a perfect match for the job that they have to complete. With the help of surveillance equipment, they work "outside the law" and get the right criminal behind bars. 

On Valentine's Day 1962, the kids aboard the Funship learn important life lessons.