It is the end of the First Schleswig War and we follow the lives of two young boys living in a rural part of Denmark. Their dad along with the baron's son, Didrich returns home as veterans. The dad sustained a leg wound and Didrich possibly got PTSD. In a modern story arch, a young girl Claudia is sent to help an old Baron.

Laust, Peter and Inge grow up and with that comes a desire to travel, helped along by visiting gypsies' stories of the world outside Denmark. The politician Monrad, speaking with newfound eloquence, stirs up the already rather superior feeling members of Parliament and the euphoria spreads through the people of Denmark. Schleswig is to be incorporated into the Danish Kingdom, even though it may lead to war. Laust and Peter are in love with Inge and she loves them both. But now they must part, as Laust and Peter report for duty in the Danish Army.

Monrad forces a new constitution through Parliament that incorporates Schleswig into the Danish kingdom, and, as expected, triggers a declaration of war from Prussia. Laust and Peter meet their young comrades in arms, as well as the experienced and mysterious Johan, and get a taste of how real the horrors of war can be. The brothers exchange letters with Inge, but Laust also sends her secret letters.

Peter and Laust reach Dannevirke, where they meet their new Captain - a familiar face from the estate back home - but not exactly a happy reunion. Laust and Inge continue their secret letter writing but an incorrectly delivered letter causes serious consequences for the relationship between the otherwise inseparable brothers. Dannevirke turns out not to be nearly as impregnable as people have been boasting, and General De Meza decides, against the will of the powers that be in Copenhagen, to withdraw from Dannevirke to Dybbøl.