Thomas de Frémont is a 9-year old child who believes in Santa Claus. He is also a computer genius who idolizes superheroes and loves action movies. Cosplaying Rambo, he tests a self-designed security system controlled by a mobile device attached to his arm, preparing not only for an intruder, but a close encounter with Santa Claus himself. Ironically, the two end up being one and the same, and Thomas is deceived into giving his address to a disturbed imposter through a pre-Internet telecommunications platform. A deadly game of cat and mouse ensues, where all of Thomas' skills and beliefs are put to the ultimate test.