Former IRA agent Sean Dillon comes to the rescue when a woman discovers a briefcase containing plans that could destroy all of Europe. Dillon's assignment is to protect her until the plans can be properly destroyed.
While visiting Switzerland, an American college professor, Adam, keeps running into a divorced British secretary, Patricia, wherever they go. First their cars collide. Then they smash into one another on a ski slope, each breaking a leg. In between numerous quarrels, the two develop lust and love. They hastily marry, but the disagreements continue. Patricia decides to leave, so Adam decides to fake a suicide. They lose and find each other, again and again.