One of the islands in the vicinity of Hong Kong now has a large oil field, to which the UK would like favorable concessions. To show the British presence, HMS Hero drops anchor in the port and Captain Holt and his crew practice their diplomacy ashore. The man with the most influence on the island, a Mr.Zee Khay Lim, Minister for Foreign Affairs presents a difficult challenge for Captain Holt, although it is his daughter Akiko who inadvertently helps to tip the situation in favour of the British.