Sir Leslie Colin Patterson KBE is sent to an oil-rich Gulf state to try to make peace after a United Nations blunder. While there, he escapes from a firing squad and discovers a diabolical plan to hold the world to biological ransom.

Meanwhile, undercover CIA agent Dame Edna Everage arrives on a 'Possums For Peace' tour. On a visit to a local factory, she also discovers the real truth. Together, Sir Les and Dame Edna set out to save the world.