Johnny Riggs, a con man on the lam, finds himself in a Latin-American country named Patria. There, he overhears a convent-bred rich girl praying to her guardian angel for help in managing her tangled business affairs. Riggs decides to materialize as the girl's "angel", gains her unquestioning confidence, and helps himself to the deluded girl's millions. Just as he and his partner are about to flee Patria with their booty, Riggs realizes he has fallen in love with the girl and returns the money, together with a note that is part confession and part love letter. But the larcenous duo's escape from Patria turns out to be more difficult than they could ever have imagined.

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