In April of 1969, word comes to Vladivostock of a terrible storm – hurricane Agatha – that is precisely what’s needed for a special project... Two days later, a fisherman on Lake Ontario suddenly finds himself on dry land. Steed, Gambit and Purdey enlist Bailey to intercept a courier who buries his package. When dug up, they discover it is a Mark 6 guidance system – absolutely cutting edge of the Russian missile program. So what is it doing in a desolate part of Canada? They return it and observe the spot, and the pickup man retrieves it and... throws it into the lake! Steed and his team must discover how all this ties to “Forward Base” and what kind of threat Forward Base poses to Canadian security.