British thriller from the Boulting brothers starring Tony Britton, Peter Cushing, Virginia Maskell and Spike Milligan.

A team of scientists led by Professor Sewell have been researching cures for plague.

When their findings are suppressed by the government, junior scientist Bob Marriott s so outraged that he allows himself to be unwittingly used as a pawn in a fiendish, foreign plot.

Light relief is provided by Spike Milligan who appears as a bumbling, Irish caretaker.