Hidden War explores the ongoing confrontation between pro-Palestinian and Zionist organisations. It looks at the fight that manifests itself in different fields and communities across Europe. It investigates the goals of a number of organisations - The Bacon Foundation - trying to shut down pro-Palestinian activist groups and institutions. The film also follows the efforts of the Boycott Divestment and Sanctions group as they try to raise awareness of boycotting large corporate pro-Israeli companies, whose profits directly contribute to the establishment, building and maintenance of illegal Israeli settlements in Palestine. The film also investigates the story of Sheikh Raed Salah, who was deported from Britain during his visit in 2011 and was accused of Semitism. Along with his supporters, they entered into a fierce judicial trial against the interior ministry who was backed a leading pro-Israeli organisation in Britain.