On a historical pretext, Christian Dob paints a comedy in love, whose backdrop is the failed government of a lazy Merovingian king. King Childeric II crosses his kingdom. His oxen get bogged down. We must change the coupling. While waiting for the new oxen, the king receives a visit from Isabelle, the peasant patriot, who will give him advice to better govern. She is thirteen centuries in advance this maid! And neither his father Mouchaperchot, nor Lochaire the grumbling soldier, nor Bathilde the abusive queen-mother, nor gallopin the devious monk, nor Chantoiseau the morganatic husband, nor feudal rebels will succeed in undermining Isabelle's ideal. Through Neustria, Austrasia, Burgundy, Aquitaine, Normandy, Europe is on the move, but the oxen go slowly is well known ...