When the Walker family members switch bodies with each other during a rare planetary alignment, their hilarious journey to find their way back to normal will bring them closer together than they ever thought possible.

Ranma Saotome, a teenage martial artist, and his father Genma travel to the 'cursed training ground' of Jusenkyo in China. There, despite the warnings of the Chinese guard, they fall into the cursed springs. From now on, whenever Ranma is doused in cold water, he turns into a girl and a cute, well-built redhead at that. Hot water changes him back into a man again, but only until the next time. To make matters worse, his father engages him to Akane Tendo, a girl who hates boys.

Christmas is anything but ordinary when three bickering siblings from a newly blended household cannot see eye to eye. The youngest one, while completing his annual science project, accidentally calls upon the spirit of Christmas. They wake up to find themselves having switched bodies, unable to change back until they learn to spend the holidays together as a loving family.