The princesses are heading for their first day of school when they come across a lost whale; Tubarina takes the pearl from her father's scepter for an exposition.

A whale is trapped on the beach and the girls must ask the help of a boy from dry land; Ester finds a pair of golden penguin earrings with a secret.

The princesses escape from their babysitter and go to the Royal Ball; Leo is sick with worry and can't lead the whale migration.

Polvina's diary is stolen; Polvina and Tentie find a beautiful box with a toy inside.

Three young princesses reign over the sea.

Elektra returns from a long trip; the crabs invade Polvina's home forcing her to sleep one night in Tubarina's and Ester's home.