On the planet Mars, Martian leaders grow concerned as their children become captivated by television broadcasts from Earth featuring Santa Claus. To combat their children's growing depression and lack of motivation, the Martians, led by their ruler Kimar, decide to kidnap Santa Claus and bring him to Mars, believing that his joyous spirit and gift-giving can instill happiness in the young Martians. They set off for Earth, but mistakenly abduct two Earth children, Billy and Betty, who were trying to save Santa from their clutches. Undeterred, the Martians finally succeed in capturing Santa Claus and transport him and the children back to Mars.

As Santa and the children adjust to life on Mars, they encounter both friendly and hostile Martians. Santa's influence begins to spread as he starts making toys and spreading cheer among Martian children. However, not all Martians are pleased with these changes, particularly the grumpy Martian Voldar, who believes Santa's presence will undermine their society's strict and disciplined nature. Tensions rise as Voldar plots to eliminate Santa and restore the old ways. Amidst the growing danger and unrest on Mars, the true spirit of Christmas faces challenges that require courage, unity, and the help of unexpected allies.