The program is set in the fictional town of Junctionville, New York (state) around the turn of the 20th century. Santa Claus is offended by an Anonymity letter printed in the town's newspaper (and signed "all of us") claiming that he doesn't exist. In response, Santa returns the entire town's letters to them unopened. Upon reading the anonymous letter printed in the newspaper, Father Mouse — a mouse assistant to the human clockmaker Joshua Trundle — immediately suspects that his brainy son Albert is its author. Albert confirms his suspicions, repeating the letter wikt:verbatim to him.