On a secluded and ancient farm, nestled near the quaint Alaskan village of North Peak, Chris Cringle and his devoted wife Ruth diligently operate a workshop dedicated to creating Christmas gifts. This festive enterprise, which plays a vital role in the economy, faces an increasing threat as the US government, grappling with Chris's declining profits—largely due to the growing ruthlessness of children—begins to cut back on financial support.
To compensate for Chris's dwindling income, Captain Jacobs of the US military proposes a two-month contract (to manufacture jet fighter components) that Chris ultimately rejects. The liaison agents attempt to alleviate Chris's growing fears by suggesting that even this arrangement is unlikely to endure, as subsidies are expected to plummet in the coming year. Nevertheless, with his spirits lifted by Ruth, Chris hesitantly concedes to accept the government's offer just this once.
Among the many individuals affected by a deteriorating moral compass is Billy Wenan, a vile boy whose heart matches the cruelty of his actions. Living with his ailing grandmother, Billy engages in despicable behavior, targeting those he deems inferior, including a girl named Christine Crawford. After receiving a lump of coal from Chris on Christmas Eve—symbolizing his despicable deeds—Billy vows revenge and hires hitman Jonathan Miller to eliminate Chris.
As Miller embarks on a savage killing spree driven by his long-held resentment against Chris, he soon discovers the harmless toy maker while retrieving his mail from the Post Office, setting the stage for an ominous confrontation. Invading Chris's peaceful farm, Miller dispatches US Army soldiers before sneaking into the workshop. An alert from an elf worker momentarily saves the day, but chaos ensues as Miller eliminates him and triggers a destructive explosion, obliterating the workshop while evacuating the workers, including Captain Jacobs.
In an intense showdown, Chris confronts Miller, emerging victorious from their titanic duel. However, the victory is bittersweet as Miller manages to inflict a gunshot wound to Chris's head after initially wounding him with a hidden blade. Yet, in a shocking twist, Ruth avenges her husband, ending Miller's violent spree. Gradually regaining his strength, Chris learns of Billy's sinister plan to lace his grandmother's milk with fontanel in a twisted scheme to conceal his fraudulent activities.
Furious over the chaos caused by Billy, Chris admits to having become complacent in managing the troubling behavior of malevolent youth. He issues a stern warning to Billy, vowing that if he dares to torment anyone again, he will be dealt with accordingly. With a renewed sense of purpose and optimism for the future, Chris, Ruth, and the elves roll up their sleeves to rebuild the workshop, envisioning an establishment that is not only larger but vastly improved, ensuring that the spirit of Christmas continues to shine bright.