Discovered fending for themselves by social workers, Jack, Ellie, and Jamie go to live with their father. Where Jack finds two old dinghies in a shed and to the children’s delight messing around on the river until disaster strikes.

They fall ever downwards into the clutches of Balor of the Evil Eye. To save themselves they escape and their journey through the terrifying Fairy Underworld begins. The Oracle Rescues the children who writes everyone’s fate. He sends them on a perilous quest, which allows just two of them to get home. The courageous children face an extraordinary adventure to win seven pearls, answer seven riddles and rescue a princess.