Leonora Bolt spends her days creating incredible inventions in her TOP SECRET laboratory, under the watchful eye of her terrifying uncle.

Everything changes one day when a strange boy washes up on an inflatable lobster and reveals that Uncle Luther has been stealing her inventions and selling them on the mainland. Leonora, armed with her most important inventions, must leave Crabby Island for the first time EVER to embark on an unforgettable journey that will test her brainpower to its limits.