Thommy Thomas is on the trail of the getaway pilot who flew the gold out of Britain in a Bristol Moth. After several months, his investigations are beginning to pay off...

Harold Oscroft is a brilliant accountant, and a paymaster to the robbers. He wants nothing to do with their violence, and is frightened when it enters his own safe, suburban family life. Cradock believes that, through Oscroft, he may have got sight of his real quarry.

In spite of many warnings from above, Cradock advances into deadly territory in his pursuit of the bullion bigwig.