In Congo City, BKA agent Sophia von Erlen follows arms dealer Viktor Lunth, who wants to organize a new war with an African general. When Lunth gets on a plane back to Frankfurt, Sophia follows him. She doesn't know yet that Lunth has discovered her and already informed his orderers in the Vatican - the secret organization Ares. The leading heads want to prevent Lunth to get caught by the police. They kidnap the wife of the pilot and stud the German plane control center. The passengers of the plane have no idea. One of them is the abbot primate of the catholic church. He is on his way to the monastic order Pugnus Dei near Frankfurt. In the convent everyone is waiting for him, when they discover that Brother Gladius drunk the wine and is missing. Brother Lasko, ring carrier and friend of Gladius, tries to find him. He does and they are on their way home, when a plane is landing right in front of them on a country road. While a Ares commando assails the machine, can Lasko help unnoticed the passengers. When the operational unit of the BKA come to the scene the situation for the passengers gets worse.
Bishop Renaud is on his way to Rome to give cardinal N'Kasa a report on the secret organization Ares. But the heads of Ares already know about the report and try everything to prevent that the report ever gets to Rome. After Renaud survives a first assassination he asks Lasko for help, who gets his first mission as carrier of the Pugnus Dei ring. Magnus gives Lasko and Gladius the order to bring the bishop and the report save to Rome. As meeting point was the convent Königsstein planed. It doesn't take long for Lasko to realizes that someone in the convent works for Ares and a commando from the organization is already on the way. After a hard fight, Lasko and Gladius can continue their trip to Rome. But at the Italian border they run into danger. Lasko can get rid of the aggressors, but Renaud dies in the hail of bullets. The dying bishop gives the report to Lasko. Now it's on him to get the report about Ares to the cardinal. Meanwhile, Sophia is asking a lot of questions and finds out that her father once was part of the monastic order Pugnus Dei.