Captain Drummond and his girlfriend want to marry but a hidden treasure in the house in which they want to celebrate their marriage is complicating the situation involving a series of deaths and an elusive murderer.
Takes a while to get going - we seem to spend twenty minutes on an overly long in-joke about "Drummond's" "(John Howard) oft-deferred wedding to "Phyllis" (Heather Angel) before we set off in search of a hidden treasure in an old house. It's a little reminiscent of "Indiana Jones" towards the end; loads of spikes and secret passages. EE Clive is great as the ever-reliable butler and Leo (Not "G" this time) Carroll proves to be more of a hindrance than a help! to our investigators.