Generation after generation, immortal Guardians like Santa Claus (Ryu Seung-ryong), the Easter Bunny (Yoo Hae-jin) and the Tooth Fairy (Han Hye-jin) protect the world's children from darkness and despair. However, an evil boogeyman named Pitch Black (Lee Jong-hyeok) schemes to overthrow the Guardians by obliterating children's belief in them. It falls to a winter sprite named Jack Frost (Lee Je-hoon) to thwart Pitch's plans and save the Guardians from destruction.