Sea Princesses

The first day of school gets off to a shaky start when Ester and Polvina decide to stop on their way to help a young whale caught up in some netting; 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 is stolen; Polvina and Tentie find a beautiful box with a toy inside.

Ester and Polvina rush to school with such a pace that they clumsily smack into the Turtle King, and his crown gets knocked off his head and snapped up by a boat's hook; Ester and Marli confidently set out on their first babysitting job.

Elektra arrives home after a long journey; a crab invasion forces Polvina to seek shelter at Tubarina and Ester's house for the night while her own home is occupied by the creatures.