Simplicius brings in the other Swedish prisoners, who, at the command of the General, are to boost camp morale by singing. But the prisoners' destiny reminds all of their own sacrifices and losses during this war. Simplicius retreats into the forest. Others follow him. They meet with a peasant (Wendelin) who had all but given up hope of ever being reunited with his son. The fact that Wendelin is still alive negates the will made so many years before by his wife, the Countess von Vliessen. Finally, Tilly and Simplicius as well as Hildegarde and Arnim find their happiness in each other.