Mae Siôn Corn mewn cariad. Ar ôl Noswyl Nadolig brysur mae wedi blino'n lân. Pan fydd ei holl waith wedi'i gwblhau am flwyddyn arall, mae'n ymuno ag Elwyn bach a'i Nana i gael ei baned flynyddol. Eleni, fodd bynnag, mae ganddo syndod i'r ddau ohonyn nhw!
Santa is in love. After a busy Christmas Eve he is exhausted. When all his work is done for another year, he joins little Elwyn and his Nana for his annual cup of tea. This year, however, he has a surprise in store for both of them!