I'm a nice little and curious little submarine! Follow me to discover the secrets of the sea, together with my friends we will live many adventures. The little Beth does not feel well. What will have been attached to her hook? She looks really ... a small oyster! Olly and Beth want to bring her home right away. But great surprises are waiting for them: a new special friend and a mysterious treasure to protect ... Ready to read: for 3 years.