'Modus Vivendi,' Part One. In Venezuela, the 'sanctuary' where he withdrew from the world, the killer reappears on the scene. What brought him back? Boredom, fatigue, the need for action? His old friend Mariano recommends him for a quick-and-dirty freelance job. Remove one banker and one international oil broker, no problem. But why is his third and final target a nun, Madre Luisa - devoted, selfless, and invested in her ministry?