Colin Tennant (also known as Lord Glenconner) was a minor member of British aristocracy who in the mid-'50s used his wealth to buy the island of Mustique in the Caribbean. Over the next 20 years, Tennant transformed the beautiful, rustic island into an exclusive resort community whose clientele included David Bowie and Mick Jagger. However, Tennant lost control of Mustique in the early '80s due to ill-advised financial decisions; this documentary follows the poorer, older, but still firmly opinionated Tennant as he revisits the island he built into a playground for the wealthy and powerful. Making no secret of his bitterness and disappointment, he visits a few of his old friends, including Princess Margaret (whom he manages to embarrass). The Man Who Bought Mustique was financed in part by the British television network Channel 4 and The Travel Channel.