Jönssonligan & den svarta diamanten

Jönssonligan & den svarta diamanten (1992) is a comedy, crime directed by Hans Åke Gabrielsson rated 5.4/10.

Sickan, the leader of the criminal Jönsson gang is incarcerated in a mental institution, attended by Dr M.A. Busé, who admire a handbook in crime that Sickan has been writing. Blackmailed by the nefarious banker Wall-Enberg, Dr Busé and Sickan's partners Vanheden and Dynamite-Harry execute Sickan's plan of stealing the valuable Black Diamond of the Romanovs from the National Museum.