Tummi, Sunni, and Cubbi learn the secret recipe for their favorite sweet treat but run into trouble when they try to make it themselves.

Igthorn and Tummi switch bodies on Tummi's birthday.

Tummi becomes a magician with Cubbi's help.

Tummi accidently causes a swarm of bugs to attack the gummiberry bushes.

Something is fishy when Sunni is jealous of Gusto's new friend Aquairanne.

While trying to find out why winter is still persisting in Dunwyn alone, Sunni, Tummi and Cubbi encounter a frost giant named Chillbeard who uses a "wind horn" to freeze everything. The cubs wonder why Chillbeard seems immature for the "Lord of Winter", wanting to play games instead of allowing spring to start.

When the castle of the knights of Gummadoon appears, Cavin is imprisoned as a spy. The Gummies only have until sunset to rescue him, as the castle only appears once every hundred years, but they also have to contend with Duke Igthorn, who plans to capture the castle.

A Gigglin causes a practical joke spree in the Glen. Will this stop the dam from being built in time to stop the water from flooding in?