Wilde is somewhat more lively than his usual somnambulist self as a devil-may-care drifter who joins his brother in Africa to mine uranium in a deserted gold mine. Upon arrival, Wilde learns that his brother has been murdered by The Leopard Men! Both of Wilde's brother's partners (Lee and
Randell) deny any knowledge of the mine. Wilde doesn't believe them nor does he believe that his brother was done in by the quasi-religious cult. Genn is the missionary who turns out to be the heavy, Reed is his niece. (Why is it that many of these B movie heavies have nieces but never daughters?)
It's a western plot set in East Africa and a far cry from Wilde's best picture, also...