You've been invited to the annual Yuletide party at Christmastime Castle. Though your host is nowhere to be found, the mysterious yet friendly butler shares a series of rhyming riddles that reveal traditional holiday songs. The flexible cast includes any number of eccentric guests who decipher the clues and then sing the festive carols together. Near the end of the evening, an unforeseen mystery brings one last quandary to this merry fest.