Each night in a major city, Sam the Security Guard locks the closed department store and joins Jodie in the Children's department as she brings a special mannequin with her even as she prepares to work on a display for the next day. With some magic words, the magic hat it wears brings it to life and becomes Jeff. Together with Muffy the Mouse, this gang learn about various things to teach younger viewer, both by the themselves and with visitors to the store.