In the sleepy coastal suburb of Willow Cove, Thorny, Lou and Happy spend much of their time swimming and surfing. When a speedboat rams the dinghy, their early morning swim becomes the start of a weekend of adventure, mystery ... and terror.

While cleaning her grandmothers bush cottage, Billy finds a ring among the rubbish, with it on her finger, she understands birds and animals whom are a great help in finding her kidnapped grandmother.