Secret agent Joss Beaumont is sent to Malawi to assassinate the president Njala.  At the last moment, the French authorities make a change of policy and betray Beaumont to the Malawi government.  After two years in captivity, Beaumont escapes from the African state and returns to Paris to enact his revenge.  He notifies his former paymasters that he intends to carry out his mission, by killing Njala during a state visit to France.  The ruthless Commissioner Rosen is assigned to prevent him at all costs…