War mobilisation in 1939: The clumsy Läppli, a loudmouth and busybody, is imprisoned for anti-military speeches. When he is later promoted to the rank of officer's orderly, he continues his wanton activities. He acts without suspicion, seems slightly goofy, a lappishly simple-minded soul, prattles into the blue and, with harmless naivety, always creates a situation that makes one laugh at the perfidy of chance or stubborn militarism.