Synopsis
Two twins, Emma and Tom, and their mother, Louise, move into an abandoned, ramshackle and mysterious old house. The twins soon discover that not only is the house haunted, it hides a secret treasure, a legendary giant diamond. Emma and Tom set out in search of it and end up tackling two cutthroat villains who want the diamond at any cost. In the ensuing treasure hunt, the twins get an unexpected help from a genial ghost, the Fakir of Bilbao, who has been bottled up inside a ballpoint pen for half a century.