To treat her sick grandmother, Thibault had to make a potion that would put her back on her feet. A strange witch then offers to help him on condition that he gives him some ashes of Phoenix. Taking up this perilous mission, the young Montbeliarde, reckless and fearless, embarks on a supernatural quest and crosses, in turn, the path of many fantastic creatures. Cyclops, vouivre, yeti, mandragore, kitsune or werewolf… Will he manage to foil their tricks and jokes in order to save his grandmother in time?