Lucy embarks on a magical voyage to Australia in her house-ship to uncover a family mystery. Lucy must navigate the challenges of her enchanted vessel and the vast ocean to locate her Aunt Pru. The opposing forces are the curse plaguing her family and the unknown dangers of her quest, all while managing the peculiar nature of her home-turned-ship.

The premise suggests a whimsical adventure story aimed at younger readers, likely featuring a blend of magical elements and a straightforward quest narrative. The focus on a family mystery and a magical mode of transport points towards a narrative that balances wonder with a clear objective. The story is expected to be engaging for children, with a clear protagonist and a defined goal. The resolution of the family curse would likely form the climax of the tale.