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.

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