Forty-something-year-old primary school teacher Antoinette (Calamy) has been eagerly looking forward to a long-planned weekend escape with married lover Vladimir, the father of one of her pupils. However, their plans are upended by his wife’s booking of a surprise hiking trip in the picturesque Cévennes mountains in the South of France. Completely unversed in the ways of the wilderness, the spurned Antoinette impulsively decides to follow them, and once paired with an unlikely companion – an obstinate but evidently wise grey donkey..