Tubarina learns a lesson about telling the truth after a pearl she steals from her father's sceptre plunges into the depths of the Abysmal Kingdom. Ester and Polvina set out on a mission to help Tubarina retrieve it.
Ester's Grandmother is due to arrive at the Starfish palace any minute, but Ester has more important business to take care of. She must journey with her friends to Dryland to help rescue a beached whale.
Ester's conscience starts to play tricks on her when she keeps a pair of penguin shaped earrings she finds in the sand, knowing they more than likely belong to her friend, Isa.
The princesses are all very disappointed because the night of the Royal Ball has finally come and they are forbidden to attend. But curiosity gets the better of them and they decide to sneak into the ball.
The princesses can't wait for their friend, Leo the whale shark, to pass by on his yearly migration, but grow very concerned when they find him ill and in desperate need of their help.
Polvina's diary has been stolen, and everyone at school is on the hunt for it. Ester and Tubarina want to help Polvina, but deep down are more intent on reading it to find out exactly what Polvina's secrets are.
Polvina and her pet, Tentie, find a beautiful box containing an octopus doll and an indecipherable note scribbled in runes. Will they be able to find someone who might shed some light on it.
Ester and Polvina rush to school and smack into the Turtle King; his crown getting knocked right off his head and snapped up by a boat's hook. The girls set out on a mission to retrieve it for the unhappy King.
Ester and Marli confidently set out on their first babysitting job. But it all goes horribly wrong when they lose the Sea Lion King's son, Naimo, who disappears in search of his favorite toy.
