After a family tragedy turns her life upside down, 16-year-old high school student Tohru Honda takes matters into her own hands and moves out… into a tent! Unfortunately for her, she pitches her new home on private land belonging to the mysterious Soma clan, and it isn't long before the owners discover her secret. But, as Tohru quickly finds out when the family offers to take her in, the Somas have a secret of their own—when hugged by the opposite sex, they turn into the animals of the Chinese Zodiac!

Five kids are given the power to morph into any creature they wish to help them fight villainous Visser Three and his fellow Yeerks, a breed of parasitic aliens threatening Earth.