Following a fall during mistletoe picking, Druid Getafix decides that it is time to secure the future of the village. Accompanied by Asterix and Obelix, he undertakes to travel the Gallic world in search of a talented young druid to transmit the Secret of the Magic Potion.
Stuck in the corridors of time, Godefroy de Montmirail and his faithful servant Jacquouille are projected to a time of profound political and social upheavals: the French Revolution... specifically, The Terror, time of great dangers, during which the descendants of Godefroy and Jacquouille had their castle and all their property confiscated by arrogant aristocrats, fleeing and lifes hanging by a thread.