The vows of an ambitious young American priest are tested during World War II. Not only does Father John Flaherty get involved with the black market to raise money for the Vatican, he also falls in love with a young French nun.

Christopher Reeve
as Father John Flaherty

Geneviève Bujold
as Clara

Fernando Rey
as Cardinal Santoni

Jason Miller
as Don Vito Appolini

Adolfo Celi
as Cardinal Vinci

Leonardo Cimino
as The Pope

Tomas Milian
as Father Francisco

Robert Prosky
as Bishop Walkman

Joe Pantoliano
as Pvt. Joe Musso

Milena Vukotić
as Sister Verna