Mo’s favourite holiday, Rodentide, a celebration of musical sharing and inclusion is threatened when the precious bell that heralds in the holiday, The Tintinnabulum of Rodentide, is discovered missing. To save the bell and the holiday the Trekkers must empathise and understand the point of view of the Marmoyeti, the cute monster, who made off with the bell to his cave. The Trekkers show the townspeople how to include him in their festivities and capture the spirit of the holiday.