Finally Miriam Berghoff and Daniel Guth will marry. One of his wedding guests is his former friend Stefan, who comes with his wife Antonia and his son Noah. While a dance Stefan suddenly breaks down. It determines a heart failure. Daniel and Miriam act everything to save his live and cancel their wedding weeks. And another accident happened. Miriam's son Frederik has an accident with his child-motorcycle which Linda, Miriam's half-sister, has presented him. He seems to be dead. The experienced physician knows, that he has only a low surviving chance and that he has to use it.