Whilst watching a naval helicopter exercise HMS Hero rescue a Chinese girl from the water. When they return to Hong Kong it is with the assistance of the police that the mystery starts to unravel. Captain Holt and his guests are invited by wealthy businessman Henry Witzel to an opening of a local youth centre. It is not immediately apparent what the connection is between Witzel and the Chinese girl, now known as local night club singer Lily Tan. When Captain Holt and Zoe Carter do eventually piece the puzzle together it leads to a fairly surprising ending.