Guillermina and Candelario befriend Martin, a kind and interesting penguin, and teach their grandfather all about him.

While looking for a gift for their Grandma, Guillermina and Candelario encounter a starfish and contemplate its origins.

On the way to an undersea concert, Guillermina and Candelario discover that the famous trombonist, Charly Fish, has disappeared. Can they find him?

Can Guillermina and Candelario salvage the concert at the bottom of the sea?

When Candelario is reluctant to tell his grandfather about his experience competing in a surf contest with an extremely agile dolphin, Guillermina is quick to chime in.

After failing to triumph at the surf competition, Candelario feels a bit defeated. However, his grandfather and sister are there to console him as usual and an unexpected surprise awaits him.

When Candelario makes fun of her hairstyle, Guillermina storms off, only to be aided by yet another fantastical creature.

Following her argument with Candelario, Guillermina gets pampered like a queen in a deep sea hair salon with a colorful cast of characters.

Guillermina and Candelario decide to give their grandpa a birthday surprise.

After hearing about Guillermina and Candelario's adventures with a blackbird, their Grandpa finally finds out the birthday surprise they have in store for him.