Clint Eastwood directs and stars in this action adventure as a former hit man summoned from retirement to "sanction" (assassinate) an enemy spy. With government secrets stolen and a U.S. operative murdered, Jonathan Hemlock (Eastwood) must join a three-man climbing party scaling Switzerland's Eiger Mountain to eliminate the foreign spy among them. George Kennedy and Jack Cassidy also star in this thriller based on the novel by Trevanian.