Sophie and her father are sailing their yacht Salsa in a race on Sydney Harbour‎.‎ Before the race starts‎,‎ Sophie sees Zenith‎,‎ a big luxury yacht‎.‎ On board Zenith are American billionaire Conrad Rossiter and his son Ryan‎,‎ who are visiting Sydney‎.‎ As Salsa and the other boats race around the harbour‎,‎ Sophie sees something strange happening on Zenith – Ryan Rossiter is in danger‎.‎ Sophie knows she has to help‎,‎ but that’s going to take some quick thinking and clever sailing‎.‎