On a cold Christmas Eve, Frosty the Snowman was born in a schoolyard when the children built him from fresh snow and placed a discarded silk hat upon his head, bringing him to life. Frosty was the most jolly and magical snowman, filling the air with joy and singing "Happy Birthday!" at his awakening. However, Frosty faced a challenge when Professor Hinkle, realizing the silk hat's magical powers, demanded its return. Frosty set off on a perilous journey to the North Pole with his friend Karen to avoid melting.