Hannes Buck showed great presence of mind at the wheel of a money transporter: although his partner was shot dead next to him, he drove off in the middle of a robbery and left the robbers behind. Although the perpetrators and part of the loot have disappeared, Buck was able to save himself and most of the money. When Lena Odenthal questions him, she recognizes him as a friend from her youth. He is now happily married and has a family. Lena and Hannes get along again immediately. But the reunion is not easygoing, because Lena and Kopper have to assume that employees of the security company worked together with the gangsters. Lena is convinced that it couldn't have been Hannes. But Kopper finds clues that point to exactly that.